login
A298132
Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.
1
0, 54, 826, 5782, 175014, 3752401, 76791444, 1706951987, 36185741209, 786733395586, 16992126182076, 366550521559787, 7927928295359425, 171260155001322160, 3700464812129655258, 79963026370989545009
OFFSET
1,2
COMMENTS
Column 7 of A298133.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..1..1..1. .0..0..1..1..0..0..0. .0..0..1..0..0..0..0
..0..1..0..1..0..1..1. .0..1..1..1..1..0..1. .0..1..0..1..1..1..0
..0..0..1..1..0..0..0. .0..0..0..0..0..1..1. .0..0..1..0..0..0..1
..1..0..1..0..1..0..1. .0..1..1..0..0..1..0. .1..0..1..1..1..0..1
..1..1..1..0..0..1..1. .1..1..1..1..1..0..0. .1..1..0..0..0..1..1
CROSSREFS
Cf. A298133.
Sequence in context: A281775 A344272 A297865 * A008401 A247048 A280479
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2018
STATUS
approved