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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. 0

%I #9 Dec 04 2021 08:29:06

%S 1,10,314,3140,53292,487830,6811479,62248790,767197516,7042095920,

%T 81955369777,758479227700,8507298585600,79472821382440,

%U 870035427428542,8203118157997530

%N 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 Some solutions for n=3:

%e 0 0 1 0 1 0 1 1 0 0 1 0 0 0 1 1 0 0 1 1

%e 0 1 0 1 1 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1

%e 0 1 1 1 1 0 1 1 0 1 1 1 0 0 0 1 0 0 0 1

%e 0 0 1 1 1 0 1 1 0 0 1 0 0 1 1 1 0 1 1 1

%Y Row 4 of A222969.

%K nonn,more

%O 1,2

%A _R. H. Hardin_, Mar 10 2013

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)