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A304227 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero. 1
16, 8, 11, 20, 31, 89, 237, 494, 1162, 3043, 7055, 16267, 40336, 96915, 227050, 547472, 1320937, 3136649, 7499193, 18030816, 43081957, 102910086, 246694312, 590518839, 1411720911, 3379538295, 8091060448, 19355807443, 46317931730, 110870212016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A304230.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +9*a(n-3) -14*a(n-6) for n>10

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304230.

Sequence in context: A204325 A102270 A102272 * A305037 A083536 A305583

Adjacent sequences:  A304224 A304225 A304226 * A304228 A304229 A304230

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 08 2018

STATUS

approved

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Last modified October 24 19:11 EDT 2020. Contains 338009 sequences. (Running on oeis4.)