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A299223 Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 2
1, 17, 113, 628, 3669, 21792, 128610, 758715, 4478515, 26434415, 156022822, 920895737, 5435426140, 32081622538, 189355989729, 1117639651783, 6596666844249, 38935638345812, 229810595428761, 1356415664939788 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A299228.
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) +3*a(n-2) +16*a(n-3) -7*a(n-4) -32*a(n-5) -25*a(n-6) -62*a(n-7) +44*a(n-8) -57*a(n-9) -12*a(n-10) -74*a(n-11) +46*a(n-12) -20*a(n-13) -16*a(n-14) for n>16
EXAMPLE
Some solutions for n=5
..0..1..1. .0..0..1. .0..0..1. .0..1..1. .0..1..0. .0..0..1. .0..0..1
..0..1..0. .1..1..1. .1..0..1. .0..0..0. .0..1..0. .1..1..1. .1..1..1
..0..0..0. .1..1..1. .1..1..1. .0..0..0. .0..0..0. .1..1..1. .1..1..1
..0..0..0. .1..0..1. .1..1..1. .0..1..0. .0..0..0. .1..0..1. .1..0..1
..0..1..1. .0..0..0. .1..0..0. .1..1..0. .1..1..0. .0..1..0. .0..1..1
CROSSREFS
Cf. A299228.
Sequence in context: A105127 A142403 A298332 * A197360 A367940 A289472
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2018
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)