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 A167590 #4 Jul 22 2025 07:29:40 %S A167590 1,3,20,128,1269,13019,179816,2561280,45580073,831425459,18116729724, %T A167590 402900613376,10389410535965 %N A167590 The row sums of the ED4 array A167584 read by antidiagonals. %Y A167590 A167584 is the ED4 array. %K A167590 nonn %O A167590 1,2 %A A167590 _Johannes W. Meijer_, Nov 10 2009