A201351 - OEIS

A201351

Number of nX6 0..1 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor

5, 36, 273, 2732, 29540, 310036, 3030673, 27104947, 220732437, 1641106829, 11206232481, 70771398891, 416197943012, 2293568841898, 11910310629163, 58569696365494, 273928804681607, 1223107208560736, 5231237485621038

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OFFSET

1,1

COMMENTS

Column 6 of A201353

LINKS

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

FORMULA

Empirical: a(n) is a polynomial of degree 63 for n>22

EXAMPLE

Some solutions for n=5

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