A300806 - OEIS

A300806

Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

4, 29, 170, 1004, 5908, 34836, 205369, 1210811, 7138574, 42087052, 248133414, 1462925107, 8624996341, 50850561207, 299800657068, 1767540650375, 10420924293471, 61438849007573, 362226234550315, 2135584359343994

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OFFSET

1,1

COMMENTS

Column 3 of A300811.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +7*a(n-2) -10*a(n-3) -a(n-4) +4*a(n-5) -17*a(n-6) +2*a(n-7) +5*a(n-8) -6*a(n-9) +5*a(n-10) -2*a(n-12) +a(n-13)

EXAMPLE

Some solutions for n=5

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