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A316179 Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 8 king-move adjacent elements, with upper left element zero. 1
8, 112, 601, 3653, 21825, 134426, 822258, 5056910, 31069974, 191024741, 1174474898, 7221204490, 44401068802, 273006568441, 1678640794552, 10321465657940, 63463760910542, 390220558915153, 2399355322878876 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A316183.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +16*a(n-2) -43*a(n-3) -97*a(n-4) +142*a(n-5) +21*a(n-6) -90*a(n-7) +403*a(n-8) -124*a(n-9) -608*a(n-10) +630*a(n-11) +284*a(n-12) -400*a(n-13) -597*a(n-14) -326*a(n-15) +246*a(n-16) +292*a(n-17) -25*a(n-18) -42*a(n-19) +223*a(n-20) -39*a(n-21) -46*a(n-22) -56*a(n-23) +16*a(n-24) -25*a(n-25) +6*a(n-26) +11*a(n-27) +5*a(n-28) +a(n-29) +2*a(n-30) for n>34

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A316183.

Sequence in context: A239754 A003721 A281951 * A305765 A317114 A305526

Adjacent sequences:  A316176 A316177 A316178 * A316180 A316181 A316182

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 25 2018

STATUS

approved

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Last modified October 17 21:17 EDT 2021. Contains 348065 sequences. (Running on oeis4.)