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A295777 Number of nX4 0..1 arrays with each 1 adjacent to 0 or 2 king-move neighboring 1s. 1
8, 49, 198, 1059, 5263, 25529, 127731, 630988, 3118368, 15452696, 76444609, 378316752, 1872559828, 9266918261, 45863407707, 226985095214, 1123365612319, 5559672436516, 27515436853783, 136176807358073, 673954171761877 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A295781.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +6*a(n-2) +6*a(n-3) -58*a(n-4) -20*a(n-5) +29*a(n-6) -92*a(n-7) +7*a(n-8) +2*a(n-9) -2*a(n-10)

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A295781.

Sequence in context: A306049 A317226 A329051 * A319959 A270007 A344321

Adjacent sequences:  A295774 A295775 A295776 * A295778 A295779 A295780

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 27 2017

STATUS

approved

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Last modified December 5 17:08 EST 2021. Contains 349557 sequences. (Running on oeis4.)