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 A014414 #15 Feb 06 2023 10:05:02 %S A014414 3,3,5,5,15,15,7,21,35,35,21,7,9,9,45,45,11,55,165,165,55,11,495,495, %T A014414 13,715,1287,1287,715,13,91,1001,3003,3003,1001,91,15,105,455,1365, %U A014414 3003,5005,6435,6435,5005,3003,1365,455,105,15,17,17,153,153,19,171 %N A014414 Odd elements in Pascal's triangle that are not 1. %e A014414 Irregular array begins: %e A014414 3, 3 %e A014414 5, 5 %e A014414 15, 15 %e A014414 7, 21, 35, 35, 21, 7 %e A014414 9, 9 %e A014414 45, 45 %e A014414 ... %Y A014414 Cf. A007318, A014421. %K A014414 nonn,easy,tabf %O A014414 1,1 %A A014414 _Mohammad K. Azarian_ %E A014414 More terms from _Erich Friedman_ %E A014414 Offset corrected by _Mohammad K. Azarian_, Nov 19 2008