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 A222972 #9 Dec 04 2021 08:29:06 %S A222972 1,10,314,3140,53292,487830,6811479,62248790,767197516,7042095920, %T A222972 81955369777,758479227700,8507298585600,79472821382440, %U A222972 870035427428542,8203118157997530 %N A222972 Number of 4 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 A222972 Some solutions for n=3: %e A222972 0 0 1 0 1 0 1 1 0 0 1 0 0 0 1 1 0 0 1 1 %e A222972 0 1 0 1 1 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 %e A222972 0 1 1 1 1 0 1 1 0 1 1 1 0 0 0 1 0 0 0 1 %e A222972 0 0 1 1 1 0 1 1 0 0 1 0 0 1 1 1 0 1 1 1 %Y A222972 Row 4 of A222969. %K A222972 nonn,more %O A222972 1,2 %A A222972 _R. H. Hardin_, Mar 10 2013