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 A188423 #6 Jul 22 2025 11:12:43 %S A188423 1,9,625,256901,434626896,2259540285524 %N A188423 Number of (8*n)Xn binary arrays with rows in nonincreasing order, 8 ones in every column and no more than 3 ones in any row. %C A188423 Row 8 of A188416 %e A188423 All solutions for 16X2 %e A188423 ..1..1....1..1....1..1....1..1....1..1....1..1....1..0....1..1....1..1 %e A188423 ..1..1....1..1....1..1....1..1....1..0....1..1....1..0....1..1....1..1 %e A188423 ..1..1....1..1....1..1....1..0....1..0....1..1....1..0....1..1....1..1 %e A188423 ..1..1....1..0....1..1....1..0....1..0....1..1....1..0....1..1....1..1 %e A188423 ..1..1....1..0....1..1....1..0....1..0....1..1....1..0....1..1....1..0 %e A188423 ..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..1....1..0 %e A188423 ..1..1....1..0....1..0....1..0....1..0....1..1....1..0....1..0....1..0 %e A188423 ..1..1....1..0....1..0....1..0....1..0....1..0....1..0....1..0....1..0 %e A188423 ..0..0....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1 %e A188423 ..0..0....0..1....0..1....0..1....0..1....0..0....0..1....0..1....0..1 %e A188423 ..0..0....0..1....0..1....0..1....0..1....0..0....0..1....0..0....0..1 %e A188423 ..0..0....0..1....0..0....0..1....0..1....0..0....0..1....0..0....0..1 %e A188423 ..0..0....0..1....0..0....0..1....0..1....0..0....0..1....0..0....0..0 %e A188423 ..0..0....0..0....0..0....0..1....0..1....0..0....0..1....0..0....0..0 %e A188423 ..0..0....0..0....0..0....0..0....0..1....0..0....0..1....0..0....0..0 %e A188423 ..0..0....0..0....0..0....0..0....0..0....0..0....0..1....0..0....0..0 %K A188423 nonn %O A188423 1,2 %A A188423 _R. H. Hardin_ Mar 30 2011