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 A188410 #7 Jul 22 2025 11:11:23 %S A188410 1,3,39,3217,2181522,14100262412,990154499577167 %N A188410 Number of (n^2)Xn binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row. %C A188410 Diagonal of A188416 %e A188410 All solutions for 4X2 %e A188410 ..1..1....1..1....1..0 %e A188410 ..1..0....1..1....1..0 %e A188410 ..0..1....0..0....0..1 %e A188410 ..0..0....0..0....0..1 %K A188410 nonn %O A188410 1,2 %A A188410 _R. H. Hardin_ Mar 30 2011