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A316691 Number of nX6 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
32, 13, 42, 125, 359, 2081, 9442, 38020, 174483, 785604, 3427907, 15257880, 67982637, 300964560, 1335669886, 5933105093, 26325240756, 116828769988, 518611346889, 2301753155715, 10215798261389, 45343030343793 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A316693.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +5*a(n-2) +33*a(n-3) -9*a(n-4) -53*a(n-5) -229*a(n-6) +42*a(n-7) +42*a(n-8) +386*a(n-9) -47*a(n-10) -52*a(n-11) -288*a(n-12) +62*a(n-13) +216*a(n-15) +84*a(n-16) for n>21

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316693.

Sequence in context: A304228 A305038 A305584 * A275470 A162884 A029771

Adjacent sequences:  A316688 A316689 A316690 * A316692 A316693 A316694

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 10 2018

STATUS

approved

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Last modified November 27 21:31 EST 2020. Contains 338683 sequences. (Running on oeis4.)