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A316690 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1
16, 8, 21, 44, 88, 359, 1125, 3117, 10022, 31545, 95424, 296211, 920485, 2836189, 8769823, 27145969, 83899059, 259392614, 802225003, 2480455071, 7669523490, 23715722335, 73331519730, 226746858798, 701128606584, 2167967516063 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A316693.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +12*a(n-3) +2*a(n-4) -9*a(n-5) -27*a(n-6) -6*a(n-7) for n>11

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316693.

Sequence in context: A305037 A083536 A305583 * A258160 A040243 A299584

Adjacent sequences:  A316687 A316688 A316689 * A316691 A316692 A316693

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2018

STATUS

approved

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Last modified October 30 06:31 EDT 2020. Contains 338077 sequences. (Running on oeis4.)