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 A188453 #6 Jul 22 2025 11:13:27 %S A188453 0,0,0,66,30090,18014566,15978843654,20633840650794 %N A188453 Number of (5*n)Xn binary arrays with nonzero rows in decreasing order, no more than 3 ones in any row and exactly 5 ones in every column. %C A188453 Row 5 of A188449 %K A188453 nonn %O A188453 1,4 %A A188453 _R. H. Hardin_ Mar 31 2011