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A300210
Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
1
4, 32, 228, 1651, 11965, 86775, 629440, 4566023, 33122989, 240283124, 1743081647, 12644813016, 91729105941, 665429316237, 4827215711786, 35018011778092, 254030734032018, 1842812043966813, 13368288852038965, 96977414177346279
OFFSET
1,1
COMMENTS
Column 3 of A300215.
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) -4*a(n-2) -8*a(n-3) -15*a(n-4) -4*a(n-5) -25*a(n-6) -44*a(n-7) -12*a(n-8)
EXAMPLE
Some solutions for n=5
..0..1..0. .0..0..0. .0..1..1. .0..0..1. .0..0..1. .0..0..0. .0..0..1
..0..1..0. .0..0..1. .0..0..0. .0..1..0. .0..1..1. .1..1..1. .0..0..1
..1..0..1. .0..1..1. .0..1..1. .0..1..0. .0..1..0. .1..1..0. .0..0..1
..1..1..0. .1..0..1. .0..1..0. .1..1..0. .1..0..1. .1..0..0. .0..0..1
..0..0..1. .0..0..1. .1..1..1. .0..1..1. .1..0..0. .0..1..1. .0..0..1
CROSSREFS
Cf. A300215.
Sequence in context: A320366 A317560 A302742 * A302736 A033515 A300799
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 28 2018
STATUS
approved