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A299649 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1
4, 32, 247, 1924, 14981, 116654, 908360, 7073213, 55077652, 428878329, 3339587196, 26004677512, 202493066595, 1576771794248, 12277997133149, 95606234301950, 744466050795960, 5797003771085993, 45140074132400664, 351496458022297409 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A299654.

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) +5*a(n-2) +9*a(n-3) -a(n-4) -6*a(n-5)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299654.

Sequence in context: A301779 A147551 A316803 * A317520 A300203 A273053

Adjacent sequences:  A299646 A299647 A299648 * A299650 A299651 A299652

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2018

STATUS

approved

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Last modified March 3 10:38 EST 2021. Contains 341762 sequences. (Running on oeis4.)