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A300133 Number of nX3 0..1 arrays with every element equal to 0, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1
1, 1, 16, 17, 88, 209, 673, 1898, 5663, 16545, 48646, 142901, 419539, 1232678, 3619709, 10633075, 31228714, 91726953, 269411911, 791311296, 2324199617, 6826550249, 20050655360, 58891959789, 172975044139, 508055149876 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A300138.

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300138.

Sequence in context: A003999 A217844 A041532 * A041534 A306572 A041536

Adjacent sequences:  A300130 A300131 A300132 * A300134 A300135 A300136

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 26 2018

STATUS

approved

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Last modified November 22 03:37 EST 2019. Contains 329386 sequences. (Running on oeis4.)