|
| |
|
|
A006933
|
|
`Eban' numbers (the letter `e' is banned!).
(Formerly M1030)
|
|
8
| |
|
|
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; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| 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'.
|
|
|
REFERENCES
| J. C. Hernandez et al., "Characterization of Eban numbers", pp. 197-200, Journal of Recreational Mathematics, 31 (3) 2002-2003.
Georges Perec, La disparition, Editions Gallimard, Paris, 1969; English translation: A Void, Harvill, 1994. (A novel that does does not use the letter "e".)
Georges Perec, Les Revenentes [a novel in which the only vowel that appears is `e']. - From Simon Plouffe, Mar 12 2010
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
|
|
|
LINKS
| Author?, What comes next? in Science News for Kids.
Eric Weisstein's World of Mathematics, Eban Number
|
|
|
PROG
| (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
|
|
|
CROSSREFS
| Cf. A082504.
Sequence in context: A106274 A204661 A077633 * A046847 A121069 A100838
Adjacent sequences: A006930 A006931 A006932 * A006934 A006935 A006936
|
|
|
KEYWORD
| word,nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
