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A316514 Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero. 1
8, 49, 75, 204, 619, 1710, 4894, 14053, 40063, 114638, 327924, 937707, 2681815, 7670058, 21936014, 62736041, 179423533, 513145422, 1467578778, 4197229249, 12003940959, 34330885028, 98185232056, 280806616573, 803097918855 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A316518.

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316518.

Sequence in context: A303723 A305226 A304771 * A352179 A304468 A272713

Adjacent sequences: A316511 A316512 A316513 * A316515 A316516 A316517

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 05 2018

STATUS

approved

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Last modified November 28 22:51 EST 2022. Contains 358421 sequences. (Running on oeis4.)