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A299316 Number of nX3 0..1 arrays with every element equal to 0, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
1, 1, 15, 10, 70, 146, 434, 1206, 3228, 9186, 24772, 69398, 189942, 526396, 1450524, 4005122, 11055658, 30506770, 84220672, 232416524, 641554400, 1770641470, 4887237832, 13489036144, 37230869642, 102760304362, 283626021494 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A299321.

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A299321.

Sequence in context: A123542 A215236 A040212 * A321419 A013379 A013449

Adjacent sequences:  A299313 A299314 A299315 * A299317 A299318 A299319

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 06 2018

STATUS

approved

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Last modified May 21 00:36 EDT 2022. Contains 353886 sequences. (Running on oeis4.)