%I A006933 M1030
%S A006933 2,4,6,30,32,34,36,40,42,44,46,50,52,54,56,60,62,64,66,2000,2002,
%T A006933 2004,2006,2030,2032,2034,2036,2040,2042,2044,2046,2050,2052,2054,2056,
%U A006933 2060,2062,2064,2066,4000,4002,4004,4006,4030,4032,4034,4036,4040,4042,
               4044,4046,4050,4052,4054,4056
%N A006933 `Eban' numbers (the letter `e' is banned!).
%C A006933 Invented by N. J. A. Sloane (njas(AT)research.att.com) circa 1990.
%C A006933 Theorem (N. J. A. Sloane): In English every odd number contains an `e'.
%D A006933 J. C. Hernandez et al., "Characterization of Eban numbers", pp. 197-200, 
               Journal of Recreational Mathematics, 31 (3) 2002-2003.
%D A006933 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A006933 Author?, <a href="http://www.sciencenewsforkids.org/articles/20080409/
               PuzzleZone.asp">What comes next? in Science News for Kids</a>.
%H A006933 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               EbanNumber.html">Eban Number</a>
%o A006933 (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
%Y A006933 Cf. A082504.
%Y A006933 Sequence in context: A141526 A106274 A077633 this_sequence A046847 A121069 
               A100838
%Y A006933 Adjacent sequences: A006930 A006931 A006932 this_sequence A006934 A006935 
               A006936
%K A006933 word,nonn
%O A006933 1,1
%A A006933 N. J. A. Sloane (njas(AT)research.att.com).