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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.

A222854 Number of n X n 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope.

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%I A222854 #7 Jul 23 2025 03:09:44
%S A222854 2,6,108,2262,452400,113936464,391515458264,1332606996955912
%N A222854 Number of n X n 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope.
%C A222854 Diagonal of A222862
%e A222854 Some solutions for n=3
%e A222854 ..1..0..1....0..1..0....0..1..0....0..0..1....0..1..0....0..0..1....0..0..0
%e A222854 ..1..1..1....1..1..1....0..1..0....1..0..1....0..1..0....0..0..1....0..0..1
%e A222854 ..1..0..1....0..1..0....0..1..0....1..0..1....0..1..1....1..0..1....0..0..0
%K A222854 nonn
%O A222854 1,1
%A A222854 _R. H. Hardin_ Mar 07 2013

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