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A297811 Number of nX5 0..1 arrays with every element equal to 2 or 3 king-move adjacent elements, with upper left element zero. 1
0, 8, 0, 13, 24, 41, 39, 109, 216, 471, 883, 1826, 3771, 7957, 16180, 33265, 68409, 141908, 292327, 602447, 1240608, 2561035, 5282041, 10893334, 22455433, 46313241, 95513864, 196987195, 406204281, 837692722, 1727540167, 3562722575, 7347181938 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A297814.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +a(n-2) -2*a(n-3) +4*a(n-4) -4*a(n-5) -8*a(n-6) -a(n-7) +5*a(n-8) +a(n-9) +4*a(n-10) +a(n-11) -3*a(n-12) for n>21

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A297814.

Sequence in context: A112268 A077062 A189764 * A325318 A255680 A265115

Adjacent sequences:  A297808 A297809 A297810 * A297812 A297813 A297814

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2018

STATUS

approved

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Last modified August 4 13:27 EDT 2021. Contains 346447 sequences. (Running on oeis4.)