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 A224528 #5 Jun 02 2025 08:31:13 %S A224528 1458,10830,36042,99774,208146,430278,745650,1289622,2048514 %N A224528 Number of idempotent 6X6 0..n matrices of rank 1. %C A224528 Row 6 of A224524 %e A224528 Some solutions for n=2 %e A224528 ..0..0..1..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..1..0..0..0 %e A224528 ..0..0..0..0..0..0....0..0..0..0..2..2....0..0..0..0..0..0....0..0..2..0..0..0 %e A224528 ..0..0..1..0..0..0....0..0..0..0..1..1....1..0..0..0..1..2....0..0..1..0..0..0 %e A224528 ..0..0..2..0..0..0....0..0..0..0..2..2....0..0..0..0..0..0....0..0..0..0..0..0 %e A224528 ..0..0..1..0..0..0....0..0..0..0..0..0....1..0..0..0..1..2....0..0..2..0..0..0 %e A224528 ..0..0..1..0..0..0....0..0..0..0..1..1....0..0..0..0..0..0....0..0..1..0..0..0 %K A224528 nonn %O A224528 1,1 %A A224528 _R. H. Hardin_ Apr 09 2013