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A266433 Number of 7Xn binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.

%I A266433 #4 Dec 29 2015 10:20:02
%S A266433 8,70,826,12758,223075,3825307,59155748,798834778,9379683461,
%T A266433 96481143688,879275711012,7183343579974,53182973236784,
%U A266433 360298764101463,2252503422916387,13090825673375302,71176326297105679,364068218093477268
%N A266433 Number of 7Xn binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.
%C A266433 Row 7 of A266428.
%H A266433 R. H. Hardin, <a href="/A266433/b266433.txt">Table of n, a(n) for n = 1..210</a>
%H A266433 R. H. Hardin, <a href="/A266433/a266433.txt">Empirical polynomial of degree 57</a>
%F A266433 Empirical polynomial of degree 57 (see link above)
%e A266433 Some solutions for n=4
%e A266433 ..0..0..0..0....0..0..0..0....0..0..1..1....0..0..0..0....0..0..0..1
%e A266433 ..0..0..1..1....0..0..0..0....0..1..0..1....0..0..1..1....0..0..0..1
%e A266433 ..0..0..1..1....0..0..0..1....0..1..1..0....0..0..1..1....0..0..0..1
%e A266433 ..0..1..0..1....0..0..0..1....0..1..1..1....0..1..0..0....0..1..1..0
%e A266433 ..0..1..0..1....0..0..0..1....1..0..0..0....0..1..0..1....0..1..1..0
%e A266433 ..1..0..1..1....0..1..1..0....1..0..1..0....0..1..0..1....1..0..0..1
%e A266433 ..1..1..0..0....0..1..1..0....1..1..0..1....1..0..1..0....1..0..1..1
%Y A266433 Cf. A266428.
%K A266433 nonn
%O A266433 1,1
%A A266433 _R. H. Hardin_, Dec 29 2015