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A299446
Number of n X 3 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
1
3, 4, 1, 4, 10, 6, 11, 41, 24, 42, 169, 100, 159, 710, 405, 643, 2995, 1673, 2659, 12648, 6948, 11132, 53434, 29109, 46870, 225916, 122510, 197807, 955669, 517066, 835904, 4044687, 2185734, 3535227, 17123968, 9247255, 14959235, 72513441, 39141547
OFFSET
1,1
COMMENTS
Column 3 of A299451.
LINKS
FORMULA
Empirical: a(n) = a(n-1) +5*a(n-3) -5*a(n-4) +a(n-5) -2*a(n-6) +2*a(n-7) -2*a(n-8) -8*a(n-9) +5*a(n-10) -10*a(n-11) +10*a(n-12) +a(n-13) +2*a(n-14) +7*a(n-15) +a(n-17) +a(n-18) for n>19.
EXAMPLE
Some solutions for n=5
..0..0..0. .0..0..0. .0..1..0. .0..1..1. .0..0..1. .0..1..1. .0..0..0
..0..0..0. .0..0..0. .0..1..0. .0..1..1. .0..0..1. .0..1..1. .0..0..0
..0..0..0. .1..1..1. .0..0..0. .1..1..1. .1..1..1. .1..1..1. .0..0..0
..0..0..0. .1..1..1. .0..1..0. .0..1..1. .1..1..0. .1..0..0. .1..1..1
..0..0..0. .1..1..1. .0..1..0. .0..1..1. .1..1..0. .1..0..0. .1..1..1
CROSSREFS
Cf. A299451.
Sequence in context: A293190 A091542 A247041 * A300084 A321624 A079529
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 10 2018
STATUS
approved