A227255 Number of n X 5 binary arrays indicating whether each 2 X 2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1) X 6 binary array with rows and columns of the latter in lexicographically nondecreasing order.

11, 53, 450, 4578, 44379, 385212, 2925969, 19641271, 118614860, 654214381, 3334753195, 15858202072, 70892618881, 299805425605, 1205758757487, 4632388331446, 17066069541973, 60489294799563, 206864212649513

Offset

1,1

Comments

Column 5 of A227256.

Links

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

R. H. Hardin, Empirical polynomial of degree 47

Formula

Empirical polynomial of degree 47 (see link above).

Example

Some solutions for n=4
..1..1..1..0..0....1..1..1..0..1....1..1..0..0..0....1..1..1..1..1
..1..1..0..1..1....1..0..0..1..1....1..0..1..1..1....1..1..1..0..0
..1..1..1..1..1....0..1..1..0..1....1..1..1..1..1....1..1..0..0..0
..1..0..0..1..1....1..1..0..1..0....1..0..1..1..0....1..0..0..0..0

Crossrefs

Cf. A227256.

Sequence in context: A227965 A196468 A252833 * A104291 A172495 A003867

Adjacent sequences: A227252 A227253 A227254 * A227256 A227257 A227258

Keyword

nonn

Author

R. H. Hardin, Jul 04 2013

Status

approved