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 A028278 #8 Jul 02 2025 16:01:55 %S A028278 5,5,7,7,23,23,9,31,55,55,31,9,11,11,61,61,13,73,237,237,73,13,735, %T A028278 735,15,1045,1947,1947,1045,15,115,1441,4587,4587,1441,115,17,131,611, %U A028278 1937,4433,7579,9867,9867,7579,4433,1937,611,131,17,19,19,185,185,21,205 %N A028278 Odd elements in 4-Pascal triangle A028275 (by row) that are not 1. %K A028278 nonn,tabf %O A028278 0,1 %A A028278 _Mohammad K. Azarian_ %E A028278 More terms from _James Sellers_