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 A223746 #5 Jul 23 2025 04:27:23 %S A223746 43,43,1849,1849,162583,169219,22836827,28688507,6482059897 %N A223746 Number of nX6 0..2 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. %C A223746 Column 6 of A223747 %e A223746 Some solutions for n=3 %e A223746 ..0..2..1..1..2..0....2..0..2..2..0..2....2..0..0..0..0..2....2..1..2..2..1..2 %e A223746 ..0..1..0..0..1..0....2..0..1..1..0..2....1..2..2..0..1..2....1..0..0..0..0..1 %e A223746 ..0..2..1..1..2..0....2..0..2..2..0..2....2..0..0..0..0..2....2..1..2..2..1..2 %K A223746 nonn %O A223746 1,1 %A A223746 _R. H. Hardin_ Mar 27 2013