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A201352 Number of nX7 0..1 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor 1
6, 54, 585, 9111, 164704, 3030673, 53350918, 867792264, 12855063828, 173064550218, 2125820442965, 23973988256341, 249906703874274, 2423485396921085, 21992456168363649, 187733722448990317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A201353

LINKS

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

FORMULA

Empirical: a(n) is a polynomial of degree 127 for n>46

EXAMPLE

Some solutions for n=4

..0..0..0..1..1..1..1....0..0..0..1..1..1..1....0..0..0..0..1..1..1

..1..1..1..0..0..0..0....0..1..1..0..1..1..1....0..1..1..1..0..0..0

..1..1..1..0..0..0..1....1..0..0..0..1..1..1....1..1..1..1..0..0..0

..1..1..1..0..0..0..1....1..1..1..0..0..0..1....1..1..1..1..0..1..1

CROSSREFS

Sequence in context: A098658 A109576 A241843 * A186375 A231554 A069726

Adjacent sequences:  A201349 A201350 A201351 * A201353 A201354 A201355

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 30 2011

STATUS

approved

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Last modified August 14 19:47 EDT 2020. Contains 336483 sequences. (Running on oeis4.)