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A304229 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero. 1
64, 21, 22, 97, 237, 1047, 5541, 19470, 72554, 329358, 1331161, 5120619, 21276175, 87804949, 349859140, 1418049994, 5809015813, 23497185055, 95020229983, 386707125531, 1570037273822, 6360323882123, 25819095718742, 104839429584858 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A304230.

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) +19*a(n-4) -109*a(n-5) -722*a(n-6) -341*a(n-7) +1126*a(n-8) +5123*a(n-9) +1568*a(n-10) -5121*a(n-11) -21519*a(n-12) -2459*a(n-13) +13191*a(n-14) +62645*a(n-15) -1411*a(n-16) -19872*a(n-17) -131183*a(n-18) +11058*a(n-19) +14817*a(n-20) +199024*a(n-21) -19396*a(n-22) +3061*a(n-23) -219869*a(n-24) +18700*a(n-25) -18617*a(n-26) +176698*a(n-27) -10818*a(n-28) +19827*a(n-29) -103176*a(n-30) +3867*a(n-31) -11600*a(n-32) +43519*a(n-33) -877*a(n-34) +4172*a(n-35) -13011*a(n-36) +139*a(n-37) -920*a(n-38) +2632*a(n-39) -15*a(n-40) +117*a(n-41) -330*a(n-42) -6*a(n-44) +20*a(n-45) for n>50

EXAMPLE

Some solutions for n=5

..0..0..0..0..0..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0

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

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

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

..0..0..0..0..0..0..0. .0..0..0..0..0..0..0. .0..0..0..0..0..0..0

CROSSREFS

Cf. A304230.

Sequence in context: A226044 A065790 A147792 * A305039 A305585 A316692

Adjacent sequences:  A304226 A304227 A304228 * A304230 A304231 A304232

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 08 2018

STATUS

approved

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Last modified January 25 15:08 EST 2021. Contains 340416 sequences. (Running on oeis4.)