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 A026232 #6 Jun 24 2025 13:26:17 %S A026232 3,6,7,9,12,15,16,18,19,21,24,25,27,30,33,34,36,39,42,43,45,46,48,51, %T A026232 52,54,55,57,60,61,63,66,69,70,72,73,75,78,79,81,84,87,88,90,93,96,97, %U A026232 99,100,102,105,106,108,111,114,115,117,120,123 %N A026232 a(n) = (1/3)*(s(n) + 1), where s = A026231. %C A026232 Apparently A026227 shifted left. - _R. J. Mathar_, Jun 24 2025 %K A026232 nonn %O A026232 1,1 %A A026232 _Clark Kimberling_