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A302732
Number of 7Xn 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
0, 421, 4064, 3316, 17828, 104969, 532511, 1932168, 7608792, 40495097, 193959222, 806044112, 3571553560, 16732139668, 77717205902, 345532208087, 1548242747664, 7108827463856, 32520170426142, 146833013273650, 664181788383321
OFFSET
1,2
COMMENTS
Row 7 of A302728.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..1..1..0. .0..0..1..0..0. .0..0..1..1..0
..1..1..1..1..1. .1..0..0..0..1. .1..1..0..1..1. .1..0..0..0..0
..0..0..0..0..0. .0..1..0..0..0. .1..0..1..0..1. .1..1..1..0..0
..0..1..0..1..0. .0..0..1..1..0. .1..0..1..0..1. .0..0..1..1..0
..0..1..1..1..1. .1..0..0..0..1. .0..1..0..1..0. .1..0..1..0..1
..0..0..0..0..0. .0..1..0..0..0. .1..0..1..0..1. .1..1..1..0..0
..0..1..1..1..1. .0..0..0..1..1. .0..1..0..1..0. .0..0..0..1..1
CROSSREFS
Cf. A302728.
Sequence in context: A340157 A302284 A353045 * A251198 A302533 A303414
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 12 2018
STATUS
approved