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A301954
Number of 5Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.
1
0, 34, 342, 7326, 120815, 2406169, 45013365, 854043977, 16129710295, 305221439281, 5771629701788, 109164158236088, 2064580944616050, 39047423296702605, 738499892840155074, 13967193695049173564
OFFSET
1,2
COMMENTS
Row 5 of A301951.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..1..1..1. .0..0..0..0..0. .0..0..1..0..1
..0..1..0..1..1. .0..1..0..0..0. .0..0..0..0..0. .1..1..0..1..0
..1..0..1..0..0. .0..0..1..1..0. .1..1..1..0..0. .1..1..1..0..0
..0..1..1..1..0. .0..1..0..0..1. .1..0..0..0..1. .1..0..0..1..1
..1..1..0..0..0. .0..0..0..1..1. .1..1..0..1..1. .0..0..1..1..1
CROSSREFS
Cf. A301951.
Sequence in context: A034978 A251938 A059338 * A368719 A362953 A244881
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 29 2018
STATUS
approved