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A296152 Number of nX3 0..1 arrays with each 1 adjacent to 3 or 5 king-move neighboring 1s. 1
1, 4, 9, 16, 34, 76, 157, 325, 692, 1459, 3064, 6460, 13602, 28711, 60557, 127434, 269291, 568608, 1197256, 2531332, 5349057, 11272003, 23844290, 50418087, 106327692, 225034106, 476101282, 1004782085, 2127548485, 4503616178 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A296157.

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-3) +5*a(n-4) +7*a(n-5) -44*a(n-6) -41*a(n-7) -63*a(n-8) -11*a(n-9) -21*a(n-10) -a(n-11) -20*a(n-12) -2*a(n-13) -2*a(n-14) +4*a(n-15)

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A296157.

Sequence in context: A068037 A167188 A295720 * A014764 A100498 A068952

Adjacent sequences:  A296149 A296150 A296151 * A296153 A296154 A296155

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 06 2017

STATUS

approved

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Last modified December 7 03:00 EST 2019. Contains 329836 sequences. (Running on oeis4.)