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A227262
Number of nX5 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X6 binary array having a sum of two or less, with rows and columns of the latter in lexicographically nondecreasing order
1
6, 96, 1111, 11932, 112349, 937865, 6961606, 46364258, 280471755, 1557597103, 8014162577, 38505244717, 173924889597, 742804988619, 3014292672706, 11671178123287, 43274437542484, 154133395370348, 528811622382841
OFFSET
1,1
COMMENTS
Column 5 of A227263
FORMULA
Empirical polynomial of degree 39 (see link above)
EXAMPLE
Some solutions for n=4
..1..1..0..0..0....1..1..1..0..0....1..1..1..1..0....1..1..1..1..1
..1..1..0..0..0....1..0..0..0..0....1..0..1..1..1....1..1..0..0..1
..1..1..0..0..0....0..0..0..0..1....0..0..0..0..1....1..1..1..1..0
..1..0..0..1..1....0..0..0..0..0....0..1..1..0..1....0..1..1..1..0
CROSSREFS
Sequence in context: A288845 A006044 A202078 * A001805 A139743 A361737
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 04 2013
STATUS
approved