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 A029666 #11 Jul 02 2025 16:01:56 %S A029666 1,1,4,1,5,1,14,6,1,20,7,1,50,27,8,1,77,35,9,1,182,112,44,10,1,294, %T A029666 156,54,11,1,672,450,210,65,12,1,1122,660,275,77,13,1,2508,1782,935, %U A029666 352,90,14,1,4290,2717,1287,442,104,15,1,9438,7007,4004,1729,546,119,16,1 %N A029666 Numbers to the right of the central elements of the (2,1)-Pascal triangle A029653. %e A029666 A029653 triangle begins: %e A029666 1 %e A029666 2, 1, %e A029666 2, 3, 1, %e A029666 2, 5, 4, 1, %e A029666 2, 7, 9, 5, 1, %e A029666 2, 9, 16, 14, 6, 1, %e A029666 2, 11, 25, 30, 20, 7, 1, %e A029666 ... %e A029666 so this triangle starts: %e A029666 . %e A029666 1, %e A029666 1, %e A029666 4, 1, %e A029666 5, 1, %e A029666 14, 6, 1, %e A029666 20, 7, 1, %e A029666 ... %K A029666 nonn,tabf %O A029666 0,3 %A A029666 _Mohammad K. Azarian_ %E A029666 More terms from _James Sellers_