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A304228 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero. 1
32, 13, 16, 46, 89, 306, 1047, 2561, 7117, 22405, 61758, 171188, 506407, 1443870, 4062403, 11720400, 33602232, 95454370, 273283613, 782856603, 2233286246, 6382670544, 18262055338, 52173909746, 149087991997, 426291895548 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A304230.
LINKS
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) +14*a(n-3) +a(n-4) -5*a(n-5) -33*a(n-6) -3*a(n-7) +5*a(n-8) +9*a(n-9) +3*a(n-11) +5*a(n-12) for n>18
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..1..1..1..1..1
..0..1..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .1..0..1..1..0..1
..0..1..0..0..0..0. .0..0..0..1..1..0. .0..0..0..0..1..0. .1..1..1..0..1..1
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..0..0. .1..1..1..1..1..1
..0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..0..0. .1..1..1..1..1..1
CROSSREFS
Cf. A304230.
Sequence in context: A070616 A079809 A070629 * A305038 A305584 A316691
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 08 2018
STATUS
approved

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Last modified May 23 22:02 EDT 2024. Contains 372765 sequences. (Running on oeis4.)