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 A026602 #14 Jun 01 2022 18:07:37 %S A026602 2,4,9,10,15,17,21,23,25,28,33,35,39,41,43,47,49,54,57,59,61,65,67,72, %T A026602 73,78,80,82,87,89,93,95,97,101,103,108,111,113,115,119,121,126,127, %U A026602 132,134,137,139,144,145,150,152,156,158,160 %N A026602 Numbers k such that A026600(k) = 2. %C A026602 It appears that a(n) gives the position of its own n-th 1 modulo 3 term, the n-th 2 modulo 3 term in A026603, and the n-th multiple of 3 in A026601. A026601 and A026603 appear to have the same sort of indexical properties. - _Matthew Vandermast_, Oct 06 2010 %Y A026602 Cf. A026600, A026601, A026603. %K A026602 nonn %O A026602 1,1 %A A026602 _Clark Kimberling_