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

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

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 A361737

Adjacent sequences: A227259 A227260 A227261 * A227263 A227264 A227265

Keyword

nonn

Author

R. H. Hardin Jul 04 2013

Status

approved