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 A028280 #8 Jul 02 2025 16:01:55 %S A028280 1,4,5,6,10,7,16,8,23,32,9,31,55,40,86,110,11,50,126,196,12,61,176, %T A028280 322,392,13,73,237,498,714,14,310,735,1212,1428,15,100,396,1045,1947, %U A028280 2640,115,496,1441,2992,4587,5280,17,131,611,1937,4433,7579,9867,18,148,742 %N A028280 Distinct elements in 4-Pascal triangle A028275 (by row). %K A028280 nonn,tabf %O A028280 0,2 %A A028280 _Mohammad K. Azarian_ %E A028280 More terms from _James Sellers_