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A305039 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 6 or 7 king-move adjacent elements, with upper left element zero. 1
64, 21, 37, 143, 319, 1359, 7757, 28535, 104561, 483316, 2036051, 7957330, 33390346, 141492687, 577385102, 2377565472, 9936658069, 41121426348, 169582044493, 703568436794, 2917409515913, 12064744257738, 49955479170946 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A305040.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +4*a(n-2) +46*a(n-3) +28*a(n-4) -96*a(n-5) -703*a(n-6) -483*a(n-7) +852*a(n-8) +4784*a(n-9) +2587*a(n-10) -3085*a(n-11) -19285*a(n-12) -7219*a(n-13) +5901*a(n-14) +53806*a(n-15) +16012*a(n-16) -4964*a(n-17) -104877*a(n-18) -36795*a(n-19) -1797*a(n-20) +140326*a(n-21) +72893*a(n-22) +8231*a(n-23) -126381*a(n-24) -103809*a(n-25) -8684*a(n-26) +74359*a(n-27) +101294*a(n-28) +5366*a(n-29) -26476*a(n-30) -68004*a(n-31) -2226*a(n-32) +4153*a(n-33) +31732*a(n-34) +669*a(n-35) +677*a(n-36) -10272*a(n-37) -144*a(n-38) -474*a(n-39) +2234*a(n-40) +17*a(n-41) +97*a(n-42) -300*a(n-43) -2*a(n-44) -8*a(n-45) +20*a(n-46) for n>51

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305040.

Sequence in context: A065790 A147792 A304229 * A305585 A316692 A302217

Adjacent sequences:  A305036 A305037 A305038 * A305040 A305041 A305042

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 24 2018

STATUS

approved

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Last modified January 22 11:21 EST 2021. Contains 340362 sequences. (Running on oeis4.)