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 A028271 #8 Jul 02 2025 16:01:55 %S A028271 1,1,4,1,5,1,13,6,1,19,7,1,45,26,8,1,71,34,9,1,161,105,43,10,1,266, %T A028271 148,53,11,1,588,414,201,64,12,1,1002,615,265,76,13,1,2178,1617,880, %U A028271 341,89,14,1,3795,2497,1221,430,103,15,1,8151,6292,3718,1651,533,118,16,1 %N A028271 Elements to right of central elements in 3-Pascal triangle A028262. %K A028271 nonn,easy,tabf %O A028271 0,3 %A A028271 _Mohammad K. Azarian_ %E A028271 More terms from _James Sellers_