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 A323649 #11 Apr 11 2019 22:49:11 %S A323649 1,3,6,12,15,21,30,48,51,57,66,84,93,111,138,192,195,201,210,228,237, %T A323649 255,282,336,345,363,390,444,471,525,606,768 %N A323649 Corner sequence of the cellular automaton of A323650. %H A323649 N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a> %H A323649 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A323649 <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a> %Y A323649 Partial sums of A323642. %Y A323649 Cf. A153006, A323641, A323650, A323651. %K A323649 nonn,more %O A323649 1,2 %A A323649 _Omar E. Pol_, Mar 03 2019