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 A026226 #7 Jul 04 2021 13:03:31 %S A026226 1,7,16,19,25,34,43,46,52,55,61,70,73,79,88,97,100,106,115,124,127, %T A026226 133,136,142,151,154,160,163,169,178,181,187,196,205,208,214,217,223, %U A026226 232,235,241,250,259,262,268,277,286,289,295,298 %N A026226 Numbers k such that A026136(k) = A026166(k). %K A026226 nonn %O A026226 1,2 %A A026226 _Clark Kimberling_