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 A323642 #9 Apr 11 2019 22:48:41 %S A323642 1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54,3,6,9,18,9,18,27,54,9,18,27,54, %T A323642 27,54,81,162 %N A323642 Row n of triangle A323641 when n -> infinity. %Y A323642 Partial sums give A323649. %Y A323642 Cf. A323641, A323651, A323650. %K A323642 nonn,more %O A323642 1,2 %A A323642 _Omar E. Pol_, Mar 03 2019