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A301967 Number of 5Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
16, 89, 100, 169, 311, 749, 1803, 4257, 10353, 25491, 62623, 154129, 380187, 938001, 2314659, 5713631, 14105377, 34823513, 85976895, 212277137, 524117847, 1294070913, 3195138873, 7889010751, 19478522291, 48093894353, 118747410843 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 5 of A301964.
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) -2*a(n-2) +5*a(n-3) -8*a(n-4) +2*a(n-5) -9*a(n-6) +7*a(n-7) -a(n-8) +8*a(n-9) +a(n-10) -4*a(n-11) -3*a(n-13) +2*a(n-14) for n>17
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..0..1..0..0. .0..1..1..0..1. .0..1..0..1..0
..0..1..1..0..1. .1..0..1..1..0. .0..0..1..0..0. .0..0..0..1..0
..0..0..1..0..1. .1..0..0..1..1. .1..0..1..1..0. .0..1..0..0..0
..1..1..1..0..1. .1..1..0..0..1. .1..0..0..1..1. .0..1..0..1..1
..1..0..1..0..0. .0..1..1..0..0. .1..1..0..0..1. .0..1..0..0..1
CROSSREFS
Cf. A301964.
Sequence in context: A309271 A120045 A301794 * A208640 A301888 A302084
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 29 2018
STATUS
approved

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Last modified May 30 06:39 EDT 2023. Contains 363045 sequences. (Running on oeis4.)