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Number of n X 7 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 08:33:03

%S 54,534,28836,487830,26342820,677339136,41972251734,1306606331404,

%T 82298403509112,3041055175823616,191470088044451700

%N Number of n X 7 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 1 0 0 0 0 1 1 0 0 1 0 0 0 1 1 0 0 0 0 1 1

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

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

%Y Column 6 of A222969.

%K nonn,more

%O 1,1

%A _R. H. Hardin_, Mar 10 2013