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A305479 Number of nX5 0..1 arrays with every element unequal to 0, 1, 3, 6 or 8 king-move adjacent elements, with upper left element zero. 1
8, 31, 40, 98, 277, 577, 1245, 2868, 6381, 14206, 31630, 70391, 157783, 351429, 782244, 1750653, 3907576, 8711942, 19467545, 43480329, 97049939, 216757294, 484138155, 1081129678, 2414527058, 5392770159, 12044266507, 26899761193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A305482.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +19*a(n-3) -11*a(n-4) -151*a(n-6) +38*a(n-7) -4*a(n-8) +656*a(n-9) +2*a(n-10) +40*a(n-11) -1712*a(n-12) -347*a(n-13) -178*a(n-14) +2773*a(n-15) +1001*a(n-16) +448*a(n-17) -2766*a(n-18) -1356*a(n-19) -670*a(n-20) +1610*a(n-21) +976*a(n-22) +580*a(n-23) -476*a(n-24) -352*a(n-25) -264*a(n-26) +48*a(n-27) +48*a(n-28) +48*a(n-29) for n>33

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305482.

Sequence in context: A303679 A304218 A304130 * A302306 A067950 A303037

Adjacent sequences:  A305476 A305477 A305478 * A305480 A305481 A305482

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 02 2018

STATUS

approved

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Last modified April 17 03:58 EDT 2021. Contains 343059 sequences. (Running on oeis4.)