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A298235 Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 1
1, 13, 22, 124, 409, 1921, 8908, 41933, 204016, 988083, 4818956, 23520912, 114859013, 561215577, 2742234243, 13400786521, 65488989956, 320045756818, 1564085835402, 7643812356261, 37356003891307, 182562316287946 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A298240.
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) +7*a(n-2) -32*a(n-3) -51*a(n-4) +118*a(n-5) +121*a(n-6) -249*a(n-7) -90*a(n-8) +292*a(n-9) -150*a(n-11) +2*a(n-12) +12*a(n-13) for n>15
EXAMPLE
Some solutions for n=5
..0..1..0. .0..1..1. .0..0..1. .0..0..0. .0..1..1. .0..1..0. .0..1..1
..1..1..1. .0..0..1. .0..1..1. .0..1..0. .1..1..0. .0..0..0. .0..0..1
..0..0..0. .1..1..0. .1..1..1. .0..1..1. .0..1..1. .0..1..1. .0..1..0
..0..0..1. .0..1..0. .0..0..0. .0..0..1. .0..0..0. .1..1..0. .1..1..0
..0..1..1. .0..0..0. .1..0..1. .1..0..0. .1..0..1. .1..0..0. .1..0..0
CROSSREFS
Cf. A298240.
Sequence in context: A301788 A164409 A301962 * A111676 A363482 A058030
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved

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Last modified April 21 04:17 EDT 2024. Contains 371850 sequences. (Running on oeis4.)