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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A227263

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 39

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 A156460

Adjacent sequences:  A227259 A227260 A227261 * A227263 A227264 A227265

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 04 2013

STATUS

approved

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Last modified April 24 12:01 EDT 2019. Contains 322429 sequences. (Running on oeis4.)