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A300497
Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
64, 1063, 3699, 14822, 66166, 291721, 1296506, 5589526, 24694845, 110652439, 496922595, 2235496431, 10093633015, 45708631844, 207362510529, 942134125486, 4286125546700, 19519540829724, 88968137138219, 405767287357238
OFFSET
1,1
COMMENTS
Column 7 of A300498.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..1..1..0. .0..1..1..0..1..1..0. .0..1..0..1..1..0..1
..1..0..1..0..0..1..0. .1..0..1..0..1..0..1. .1..0..0..0..0..0..1
..0..1..0..1..1..0..1. .0..0..0..1..1..1..1. .1..1..0..0..1..1..0
..0..1..0..1..1..1..1. .1..0..0..0..1..0..0. .0..1..0..1..0..0..1
..0..1..1..0..1..0..0. .0..1..0..1..1..0..1. .1..0..0..1..1..1..0
CROSSREFS
Cf. A300498.
Sequence in context: A221247 A280603 A301322 * A300936 A300880 A301490
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 07 2018
STATUS
approved