This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A275834 #14 Jun 24 2017 12:05:33 %S A275834 1,4,7,9,11,15,16,17,18,20,21,23,25,28,31,34,37,40,43,46,49,51,53,55, %T A275834 58,66,68,70,75,76,77,85,88,90,91,92,96,98,99,101,102,104,106,108,109, %U A275834 110,115,118,121,124,127,129,131,135,136,137,138,140,141,143,145,148,151,153,155,159,160,161,162,164,165,167,169,172,175,177,179 %N A275834 Positions of even terms in A275832; indices of those permutations in tables A060117 & A060118 where element 1 is in an even cycle. %C A275834 Equally: positions of even terms in A275726. %H A275834 Antti Karttunen, <a href="/A275834/b275834.txt">Table of n, a(n) for n = 1..10000</a> %H A275834 Indranil Ghosh, <a href="/A275834/a275834.txt">Python program for computing this sequence</a> %H A275834 <a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a> %o A275834 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A275834 (define A275834 (MATCHING-POS 1 1 (lambda (n) (even? (A275832 n))))) %Y A275834 Complement: A275833. %Y A275834 A subsequence of A273670 and A275814. %Y A275834 Cf. A060117, A060118, A275726, A275832. %K A275834 nonn %O A275834 1,2 %A A275834 _Antti Karttunen_, Aug 11 2016