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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.

A266468 Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

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%I A266468 #3 Dec 29 2015 19:55:27
%S A266468 2,8,39,261,2090,18808,175180,1595005,13720886,109830369,814603355,
%T A266468 5605474331,35922351069,215377645103,1213816837380,6458765687442,
%U A266468 32580784869691,156385330035183,716642920656832
%N A266468 Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.
%C A266468 Column 6 of A266470.
%e A266468 Some solutions for n=4
%e A266468 ..0..0..0..0..0..1....0..0..0..1..1..1....0..0..0..0..0..1....0..1..1..1..1..1
%e A266468 ..0..0..0..0..1..0....1..1..1..0..0..0....0..0..1..1..1..0....1..0..0..1..1..1
%e A266468 ..1..1..1..1..0..0....1..1..1..0..0..0....1..1..0..0..0..0....1..0..1..0..0..0
%e A266468 ..1..1..1..1..1..1....1..1..1..0..0..0....1..1..1..1..1..0....1..1..0..0..0..0
%Y A266468 Cf. A266470.
%K A266468 nonn
%O A266468 1,1
%A A266468 _R. H. Hardin_, Dec 29 2015

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