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A301538
Number of n X 5 0..1 arrays with every element equal to 0, 1 or 3 horizontally or vertically adjacent elements, with upper left element zero.
1
8, 21, 61, 212, 658, 2417, 9037, 33526, 125626, 477972, 1824213, 6971325, 26702279, 102479158, 393541270, 1511848952, 5810405859, 22336911663, 85879249631, 330208289450, 1269748921864, 4882763327280, 18776842367003, 72208138689837
OFFSET
1,1
COMMENTS
Column 5 of A301541.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..1. .0..0..1..1..1. .0..1..1..1..0. .0..1..0..1..0
..1..1..0..1..0. .1..1..0..1..0. .1..0..1..0..1. .1..0..1..0..1
..0..0..1..0..1. .0..0..0..0..1. .0..1..0..1..1. .0..1..0..1..0
..1..1..0..1..0. .1..0..1..1..0. .1..0..1..0..1. .0..0..1..0..1
..0..0..1..0..1. .0..1..0..0..1. .0..1..0..0..0. .0..1..0..0..0
CROSSREFS
Cf. A301541.
Sequence in context: A066859 A227653 A296198 * A192299 A080144 A241522
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2018
STATUS
approved