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 A115825 #3 Mar 31 2012 13:21:10 %S A115825 5,10,20,21,40,41,42,79,80,82,84,85,158,160,163,164,168,169,170,316, %T A115825 320,323,325,326,328,329,335,336,338,340,341,389,632,633,640,643,645, %U A115825 646,650,652,656,658,670,672,675,676,680,681,682,773,778,1264,1266 %N A115825 Integers i such that 8*i XOR 13*i = 23*i, but 13*i is not 29 X i. %C A115825 Here * stands for ordinary multiplication and X means carryless (GF(2)[X]) multiplication (A048720). XOR is given at A003987. %Y A115825 Cf. Setwise difference of A115823 and A115805. A115826 shows this sequence in binary. %K A115825 nonn %O A115825 1,1 %A A115825 _Antti Karttunen_, Feb 01 2006