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A222958 Number of nX7 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.

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%I A222958 #5 Jul 23 2025 03:19:09
%S A222958 20,20,400,400,8000,8000,323600,215892,14843920,9734400,1138729280,
%T A222958 631004724,117308595520,59768363024,14742894291200,7399937947392,
%U A222958 2167430898315280,1074761911462928,361218009407664960
%N A222958 Number of nX7 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.
%C A222958 Column 7 of A222959
%e A222958 Some solutions for n=4
%e A222958 ..1..1..1..0..1..1..1....0..0..1..0..1..0..0....0..1..1..1..0..0..1
%e A222958 ..0..0..1..1..1..0..0....0..1..1..0..0..0..1....0..0..1..1..1..0..0
%e A222958 ..0..0..1..1..1..0..0....0..1..1..0..0..0..1....0..0..1..1..1..0..0
%e A222958 ..1..1..1..0..1..1..1....0..0..1..0..1..0..0....0..1..1..1..0..0..1
%K A222958 nonn
%O A222958 1,1
%A A222958 _R. H. Hardin_ Mar 10 2013

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