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A295203
Number of nX6 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1s.
1
1, 9, 53, 284, 1597, 8241, 40924, 205338, 1042704, 5314555, 27092309, 138002993, 702445256, 3574586491, 18191250083, 92585186127, 471238018339, 2398510082832, 12207851011336, 62134641610255, 316247636411785, 1609610934773928
OFFSET
1,2
COMMENTS
Column 6 of A295205.
FORMULA
Empirical recurrence of order 85 (see link above)
EXAMPLE
Some solutions for n=7
..0..1..1..0..0..0. .0..1..1..0..0..0. .0..1..1..1..1..0. .0..0..0..1..1..1
..1..1..1..0..1..1. .0..1..1..0..0..0. .0..1..0..0..1..0. .0..0..0..1..0..1
..1..1..0..1..1..1. .0..0..0..0..1..1. .1..1..0..0..1..1. .1..1..1..1..0..1
..0..0..1..1..1..0. .1..1..1..0..1..1. .1..0..0..0..0..1. .1..0..0..0..1..1
..0..0..1..1..0..0. .1..0..1..0..0..0. .1..0..0..0..0..1. .1..1..0..0..1..0
..1..1..0..0..1..1. .1..0..1..0..0..0. .1..0..0..0..0..1. .0..1..1..1..1..1
..1..1..0..0..1..1. .1..1..1..0..0..0. .1..1..1..1..1..1. .0..0..0..0..1..1
CROSSREFS
Cf. A295205.
Sequence in context: A005025 A122588 A277999 * A334977 A038761 A003698
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 16 2017
STATUS
approved