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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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Theorem (N. J. A. Sloane): In English every odd number contains an `e'.
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Invented by N. J. A. Sloane (njas(AT)research.att.com) circa 1990.
J. C. Hernandez et al., "Characterization of Eban numbers", pp. 197-200, Journal of Recreational Mathematics, 31 (3) 2002-2003.
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LINKS
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Eric Weisstein's World of Mathematics, Eban Number
Author?, What comes next? in Science News for Kids.
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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.
Adjacent sequences: A006930 A006931 A006932 this_sequence A006934 A006935 A006936
Sequence in context: A141526 A106274 A077633 this_sequence A046847 A121069 A100838
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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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