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A317567 Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 1
4, 30, 170, 997, 5837, 34152, 199987, 1170900, 6855565, 40139818, 235019013, 1376041770, 8056757699, 47172493014, 276196023231, 1617133977726, 9468356040249, 55437439261116, 324587462937795, 1900466950208836 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A317572.
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) +5*a(n-2) +6*a(n-3) -38*a(n-4) +19*a(n-5) -7*a(n-6) +12*a(n-7) -19*a(n-8) -18*a(n-9) -10*a(n-10) -4*a(n-11) for n>12
EXAMPLE
Some solutions for n=5
..0..0..1. .0..1..0. .0..1..1. .0..1..0. .0..0..0. .0..1..0. .0..1..0
..0..0..1. .1..0..0. .1..0..0. .0..1..1. .1..1..1. .1..1..1. .0..1..1
..1..0..0. .0..1..1. .0..0..0. .1..0..1. .1..1..1. .1..0..1. .1..1..0
..0..1..0. .0..0..0. .1..1..1. .1..0..1. .1..1..0. .1..0..1. .1..1..0
..1..1..1. .1..1..0. .1..1..0. .1..1..0. .1..0..1. .1..0..1. .1..0..1
CROSSREFS
Cf. A317572.
Sequence in context: A217213 A119697 A316817 * A132849 A115867 A057416
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 31 2018
STATUS
approved

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Last modified April 13 20:16 EDT 2024. Contains 371645 sequences. (Running on oeis4.)