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 A028287 #12 Jul 02 2025 16:01:55 %S A028287 5,7,23,55,31,9,11,61,237,73,13,735,1947,1045,15,4587,1441,115,9867, %T A028287 7579,4433,1937,611,131,17,19,185,1241,205,21,6477,28101,7923,23, %U A028287 105621,9595,271,353685,141645,45619,11515,2191,295,25,1076559,3023603 %N A028287 Odd elements (greater than 1) to right of central elements in 4-Pascal triangle A028275. %K A028287 nonn,tabf %O A028287 0,1 %A A028287 _Mohammad K. Azarian_ %E A028287 More terms from _James Sellers_ %E A028287 Title improved by _Sean A. Irvine_, Dec 17 2019