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A299176 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. 2
8, 85, 205, 649, 2153, 7016, 22819, 73931, 239461, 777197, 2523034, 8188618, 26573796, 86235511, 279858388, 908244102, 2947587609, 9565980797, 31045039874, 100752470139, 326979037002, 1061168684227, 3443888186471, 11176703761069 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A299180.

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) -10*a(n-2) +6*a(n-3) -15*a(n-4) +31*a(n-5) -44*a(n-6) +33*a(n-7) +22*a(n-8) +97*a(n-9) -84*a(n-10) -139*a(n-11) -109*a(n-12) +111*a(n-13) +183*a(n-14) -32*a(n-15) +12*a(n-16) -113*a(n-17) +47*a(n-18) +33*a(n-19) -40*a(n-20) +26*a(n-21) -20*a(n-22) for n>28

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

Cf. A299180.

Sequence in context: A245197 A281340 A298283 * A093103 A288691 A300675

Adjacent sequences:  A299173 A299174 A299175 * A299177 A299178 A299179

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2018

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)