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 A222954 #17 Oct 17 2020 04:24:39 %S A222954 2,2,16,16,512,512,323600,144930,1808243216,615667968 %N A222954 Number of n X n 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope. %e A222954 Some solutions for n=4 %e A222954 ..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0 %e A222954 ..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1 %e A222954 ..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1 %e A222954 ..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0 %Y A222954 Main diagonal of A222959. %K A222954 nonn,more %O A222954 1,1 %A A222954 _R. H. Hardin_, Mar 10 2013