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 A222974 #9 Dec 04 2021 08:36:12 %S A222974 1,36,7344,264384,21852384,677339136,41252032201,1279444594428, %T A222974 63987904860942,2004349575346776 %N A222974 Number of 6 X (n+1) 0..1 arrays with every row least squares fitting to a positive-slope straight line and every column least squares fitting to a zero- or positive-slope straight line, with a single point array taken as having zero slope. %e A222974 Some solutions for n=3: %e A222974 0 0 1 1 0 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 %e A222974 0 0 0 1 1 0 1 1 0 0 1 0 0 0 0 1 0 0 0 1 %e A222974 0 1 1 1 1 0 1 1 1 0 1 1 0 1 0 1 0 0 1 0 %e A222974 0 0 1 1 0 0 1 1 1 0 1 1 0 0 1 1 0 1 1 1 %e A222974 0 1 0 1 0 1 1 1 0 1 1 1 0 1 1 1 0 0 1 0 %e A222974 0 1 1 1 1 0 1 1 0 1 1 1 0 0 1 1 1 0 1 1 %Y A222974 Row 6 of A222969. %K A222974 nonn,more %O A222974 1,2 %A A222974 _R. H. Hardin_, Mar 10 2013