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- Ban_number abstract "In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned." Ban numbers are not precisely defined, since some large numbers do not follow the standards of number names (such as googol and googolplex).There are five sequences of ban numbers: The aban numbers do not contain the letter A. The first few aban numbers are 1 through 999, 1,000,000 through 1,000,999, 2,000,000 through 2,000,999, ... The word "and" is not counted. The eban numbers do not contain the letter E. The first few eban numbers are 2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, 50, 52, 54, 56, 60, 62, 64, 66, 2000, 2002, 2004, ... (sequence A006933 in OEIS). The sequence was coined in 1990 by Neil Sloane. Coincidentally, all the numbers in the sequence are even. The iban numbers do not contain the letter I. The first few iban numbers are 1, 2, 3, 4, 7, 10, 11, 12, 14, 17, 20, 21, 22, 23, 24, 27, 40, ... (sequence A089589 in OEIS). Since all -illion numbers contain the letter I, there are exactly 30,275 iban numbers, the largest being 777,777. The oban numbers do not contain the letter O. The first few oban numbers are 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 23, 25, 26, ... (sequence A008521 in OEIS). Since "thousand" and all the -illion numbers contain the letter O, there are exactly 454 oban numbers, the largest being 999. The uban numbers do not contain the letter U. The first few uban numbers are 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, ...(sequence A089590 in OEIS).".
- Ban_number wikiPageID "8282811".
- Ban_number wikiPageRevisionID "557579396".
- Ban_number hasPhotoCollection Ban_number.
- Ban_number title "Aban Number".
- Ban_number title "Eban number".
- Ban_number title "Iban number".
- Ban_number title "Oban Number".
- Ban_number title "Uban number".
- Ban_number urlname "AbanNumber".
- Ban_number urlname "EbanNumber".
- Ban_number urlname "IbanNumber".
- Ban_number urlname "ObanNumber".
- Ban_number urlname "UbanNumber".
- Ban_number subject Category:Integer_sequences.
- Ban_number type Abstraction100002137.
- Ban_number type Arrangement107938773.
- Ban_number type Group100031264.
- Ban_number type IntegerSequences.
- Ban_number type Ordering108456993.
- Ban_number type Sequence108459252.
- Ban_number type Series108457976.
- Ban_number comment "In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned." Ban numbers are not precisely defined, since some large numbers do not follow the standards of number names (such as googol and googolplex).There are five sequences of ban numbers: The aban numbers do not contain the letter A. The first few aban numbers are 1 through 999, 1,000,000 through 1,000,999, 2,000,000 through 2,000,999, ...".
- Ban_number label "Ban number".
- Ban_number sameAs m.026yyfm.
- Ban_number sameAs Q4853736.
- Ban_number sameAs Q4853736.
- Ban_number sameAs Ban_number.
- Ban_number wasDerivedFrom Ban_number?oldid=557579396.
- Ban_number isPrimaryTopicOf Ban_number.