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A303186
Number of 6Xn 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
32, 857, 1938, 5050, 29124, 218980, 1064399, 5463686, 31140302, 171614778, 925440030, 5066435983, 27840038592, 152230525027, 832494089795, 4559107237431, 24960324143794, 136607957829075, 747776129893009
OFFSET
1,1
COMMENTS
Row 6 of A303182.
FORMULA
Empirical recurrence of order 84 (see link above)
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..0..1..0..0. .0..1..0..0..1. .0..0..1..0..0
..0..1..1..0..1. .1..0..0..0..1. .0..0..0..1..1. .1..0..1..0..1
..0..0..1..0..1. .1..0..1..0..1. .1..1..0..1..0. .1..1..1..0..1
..1..0..1..0..1. .1..1..1..0..1. .0..1..0..0..1. .1..0..1..0..1
..1..1..1..1..0. .0..0..1..1..1. .1..0..0..1..0. .1..0..1..1..1
..0..0..1..0..1. .0..0..1..0..1. .0..1..0..1..0. .1..0..1..0..1
CROSSREFS
Cf. A303182.
Sequence in context: A281474 A302627 A302419 * A302327 A303020 A302824
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 19 2018
STATUS
approved