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A227255 Number of nX5 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
11, 53, 450, 4578, 44379, 385212, 2925969, 19641271, 118614860, 654214381, 3334753195, 15858202072, 70892618881, 299805425605, 1205758757487, 4632388331446, 17066069541973, 60489294799563, 206864212649513 (list; graph; refs; listen; history; text; internal format)
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

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

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Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)