A283686 - OEIS

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A283686

Number of nX3 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.

8, 49, 264, 1525, 8732, 49924, 285770, 1635402, 9359104, 53561285, 306524651, 1754204129, 10039103443, 57452599764, 328794429339, 1881651609689, 10768469471919, 61626676386770, 352682175698390, 2018358353003843

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A283691.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +2*a(n-2) +14*a(n-3) -9*a(n-4) +2*a(n-5) -45*a(n-6) -20*a(n-7) -6*a(n-8) +24*a(n-9) +40*a(n-10)

EXAMPLE

Some solutions for n=4

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