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A298960
Number of nX5 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
1
0, 3, 3, 14, 31, 91, 230, 633, 1685, 4552, 12185, 32765, 87980, 236467, 635199, 1706614, 4584923, 12318567, 33096042, 88919069, 238897433, 641845172, 1724442741, 4633054817, 12447607328, 33442938823, 89851018539, 241402408354
OFFSET
1,2
COMMENTS
Column 5 of A298963.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) -a(n-2) +5*a(n-4) -9*a(n-5) -a(n-6) -8*a(n-7) +8*a(n-9) -6*a(n-10) +2*a(n-11)
EXAMPLE
Some solutions for n=5
..0..0..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..1..1..1
..0..0..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..1..1..1
..0..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1. .0..0..1..1..1
..0..0..0..0..0. .1..1..1..0..0. .1..1..1..0..0. .0..0..0..0..0
..0..0..0..0..0. .1..1..1..0..0. .1..1..1..0..0. .0..0..0..0..0
CROSSREFS
Cf. A298963.
Sequence in context: A186373 A063550 A367672 * A356117 A344213 A243545
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2018
STATUS
approved