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 A188415 #6 Jul 22 2025 11:11:52 %S A188415 2780,5396178,4505774905,1943505834628,497114063711190 %N A188415 Number of (8*n)X8 binary arrays with rows in nonincreasing order, n ones in every column and no more than 3 ones in any row. %C A188415 Column 8 of A188416 %e A188415 Some solutions for 16X8 %e A188415 ..1..0..0..0..0..0..0..1....1..0..0..0..0..0..1..1....1..0..0..0..0..0..1..0 %e A188415 ..1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0 %e A188415 ..0..1..0..0..0..0..0..0....0..1..0..0..0..0..1..0....0..1..0..0..0..1..0..0 %e A188415 ..0..1..0..0..0..0..0..0....0..1..0..0..0..0..0..1....0..1..0..0..0..0..0..0 %e A188415 ..0..0..1..0..1..0..1..0....0..0..1..0..0..1..0..0....0..0..1..0..1..0..1..0 %e A188415 ..0..0..1..0..0..0..0..0....0..0..1..0..0..0..0..0....0..0..1..0..0..0..0..1 %e A188415 ..0..0..0..1..0..1..0..0....0..0..0..1..1..0..0..0....0..0..0..1..0..0..0..1 %e A188415 ..0..0..0..1..0..0..0..0....0..0..0..1..1..0..0..0....0..0..0..1..0..0..0..0 %e A188415 ..0..0..0..0..1..0..1..0....0..0..0..0..0..1..0..0....0..0..0..0..1..1..0..0 %e A188415 ..0..0..0..0..0..1..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..1....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %e A188415 ..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0 %K A188415 nonn %O A188415 1,1 %A A188415 _R. H. Hardin_ Mar 30 2011