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A298584 Number of nX3 0..1 arrays with every element equal to 0, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. 1
1, 1, 9, 5, 16, 31, 28, 87, 125, 185, 418, 596, 1073, 2012, 3127, 5795, 10073, 16834, 30554, 52267, 90618, 160929, 276959, 486097, 853274, 1481686, 2604683, 4555304, 7957131, 13971375, 24435699, 42804128, 75078872, 131452051, 230501756 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 3 of A298589.
LINKS
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +2*a(n-3) -4*a(n-4) -2*a(n-5) -a(n-6) -a(n-7) +a(n-9) for n>13
EXAMPLE
Some solutions for n=5
..0..1..0. .0..0..1. .0..1..0. .0..0..0. .0..0..0. .0..0..0. .0..0..0
..1..1..1. .0..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0. .0..0..0
..1..0..1. .0..0..0. .1..1..0. .0..1..0. .1..1..1. .0..1..0. .1..1..1
..1..1..1. .1..1..1. .1..1..1. .0..0..0. .1..1..1. .0..0..0. .1..1..1
..0..1..0. .1..1..1. .1..1..1. .1..0..1. .0..1..1. .0..0..0. .1..1..0
CROSSREFS
Cf. A298589.
Sequence in context: A337171 A061467 A103168 * A238475 A180878 A146282
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2018
STATUS
approved

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Last modified April 12 19:05 EDT 2024. Contains 371636 sequences. (Running on oeis4.)