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A316450 Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 1
1, 11, 9, 23, 58, 126, 272, 672, 1553, 3555, 8624, 20434, 48097, 116009, 277803, 663233, 1596067, 3838951, 9220294, 22194498, 53457842, 128698832, 310008613, 747059207, 1800118460, 4338138328, 10456485093, 25204290195, 60754661477 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A316455.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +3*a(n-2) +10*a(n-3) -4*a(n-4) -29*a(n-5) -55*a(n-6) -11*a(n-7) +84*a(n-8) +149*a(n-9) +92*a(n-10) -68*a(n-11) -115*a(n-12) -73*a(n-13) -44*a(n-14) -67*a(n-15) -36*a(n-16) -4*a(n-17) for n>20

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316455.

Sequence in context: A254716 A240757 A206422 * A196006 A196003 A072208

Adjacent sequences:  A316447 A316448 A316449 * A316451 A316452 A316453

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 03 2018

STATUS

approved

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Last modified September 20 12:37 EDT 2019. Contains 327237 sequences. (Running on oeis4.)