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A304218 Number of nX5 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero. 1
8, 31, 32, 62, 141, 279, 509, 996, 1951, 3730, 7226, 14057, 27115, 52441, 101656, 196607, 380302, 736320, 1424847, 2756841, 5335651, 10325750, 19981093, 38668162, 74831614, 144811183, 280238429, 542319561, 1049489470, 2030965075, 3930321826 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A304221.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-3) +a(n-4) +a(n-6) -2*a(n-7) -a(n-10) for n>14

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A304221.

Sequence in context: A302409 A226968 A303679 * A304130 A305479 A302306

Adjacent sequences:  A304215 A304216 A304217 * A304219 A304220 A304221

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 08 2018

STATUS

approved

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Last modified August 3 13:39 EDT 2021. Contains 346438 sequences. (Running on oeis4.)