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 A029661 #8 Jul 02 2025 16:01:56 %S A029661 4,14,6,20,50,8,182,112,44,10,294,156,54,672,450,210,12,1122,660,2508, %T A029661 1782,352,90,14,4290,442,104,9438,4004,546,16,35750,27456,16744,8008, %U A029661 2940,800,152,18,63206,44200,24752,10948,3740,952,170,136136,107406 %N A029661 Even numbers to the right of the central numbers of the (2,1)-Pascal triangle A029653. %K A029661 nonn,tabf %O A029661 0,1 %A A029661 _Mohammad K. Azarian_ %E A029661 More terms from _James Sellers_