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A305228 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 8 king-move adjacent elements, with upper left element zero. 1
32, 293, 236, 541, 2050, 7062, 26528, 96528, 359365, 1331372, 4953295, 18415910, 68529992, 254994255, 948995613, 3531814704, 13144690959, 48922066241, 182080588807, 677678047930, 2522227710570, 9387403707474, 34938719542008 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A305230.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +a(n-2) -26*a(n-3) +5*a(n-4) +45*a(n-5) +11*a(n-6) -33*a(n-7) -49*a(n-8) +14*a(n-9) +29*a(n-10) +2*a(n-11) +21*a(n-12) -20*a(n-13) -21*a(n-14) +17*a(n-15) +4*a(n-16) -4*a(n-17) for n>22

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A305230.

Sequence in context: A283546 A297685 A303725 * A304773 A316516 A304470

Adjacent sequences:  A305225 A305226 A305227 * A305229 A305230 A305231

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 27 2018

STATUS

approved

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Last modified October 7 12:03 EDT 2022. Contains 357271 sequences. (Running on oeis4.)