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Search: id:A006933
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| A006933 |
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`Eban' numbers (the letter `e' is banned!).
(Formerly M1030)
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+0
9
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| 2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, 50, 52, 54, 56, 60, 62, 64, 66, 2000, 2002, 2004, 2006, 2030, 2032, 2034, 2036, 2040, 2042, 2044, 2046, 2050, 2052, 2054, 2056, 2060, 2062, 2064, 2066, 4000, 4002, 4004, 4006, 4030, 4032, 4034, 4036, 4040, 4042, 4044, 4046, 4050, 4052, 4054, 4056
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Invented by N. J. A. Sloane (njas(AT)research.att.com) circa 1990.
Theorem (N. J. A. Sloane): In English every odd number contains an `e'.
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REFERENCES
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J. C. Hernandez et al., "Characterization of Eban numbers", pp. 197-200, Journal of Recreational Mathematics, 31 (3) 2002-2003.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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Author?, What comes next? in Science News for Kids.
Eric Weisstein's World of Mathematics, Eban Number
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PROGRAM
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(MAGMA) [ n : n in [1..100] | forall{ i : i in [1..#seq] | seq[i] in eban[(i-1)mod 3+1]} where seq is Intseq(n) ] where eban is [[0, 2, 4, 6], [0, 3, 4, 5, 6], [0]]; - from Sergei Haller (sergei(AT)sergei-haller.de), Dec 21 2006
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CROSSREFS
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Cf. A082504.
Sequence in context: A141526 A106274 A077633 this_sequence A046847 A121069 A100838
Adjacent sequences: A006930 A006931 A006932 this_sequence A006934 A006935 A006936
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KEYWORD
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word,nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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