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A301605
Number of nX5 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
1
1, 6, 13, 65, 330, 1297, 6393, 30904, 154041, 764894, 3804884, 18978589, 94697319, 472770928, 2360757090, 11789229577, 58877258002, 294049444613, 1468594070621, 7334774136424, 36633069686965, 182962072923069, 913796219872826
OFFSET
1,2
COMMENTS
Column 5 of A301608.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..0..1. .0..0..0..0..1. .0..0..1..1..1
..0..0..0..1..1. .0..0..1..0..0. .0..1..1..0..0. .0..0..1..1..1
..0..1..0..0..0. .1..0..0..0..0. .0..1..1..0..0. .0..1..0..0..0
..0..0..0..1..0. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..1..0
..0..0..0..0..0. .0..0..1..1..1. .1..0..0..1..1. .0..0..0..0..0
CROSSREFS
Cf. A301608.
Sequence in context: A111366 A177127 A177175 * A119110 A041305 A215755
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 24 2018
STATUS
approved