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 A029647 #8 Jul 02 2025 16:01:56 %S A029647 4,6,14,20,8,50,10,44,112,182,54,156,294,12,210,450,672,660,1122,14, %T A029647 90,352,1782,2508,104,442,4290,16,546,4004,9438,18,152,800,2940,8008, %U A029647 16744,27456,35750,170,952,3740,10948,24752,44200,63206,20,1122,4692 %N A029647 Even numbers to the left of the central elements of the (1,2)-Pascal triangle A029635. %K A029647 nonn,tabf %O A029647 0,1 %A A029647 _Mohammad K. Azarian_ %E A029647 More terms from _James Sellers_