login
A304543
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.
1
21, 127, 129, 808, 2792, 9840, 53098, 285622, 1415123, 8070788, 46626298, 264656323, 1540155897, 9031209225, 52836601996, 310654081048, 1830571135620, 10790622849760, 63681959164268, 376067319191032, 2221525051427895
OFFSET
1,1
COMMENTS
Column 7 of A304544.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..0..1..0. .0..1..1..1..1..1..1. .0..0..1..1..0..0..0
..0..0..0..1..1..0..0. .0..0..1..1..1..1..0. .0..1..1..1..1..0..0
..0..0..0..1..1..0..0. .1..1..1..1..1..0..0. .1..1..1..1..1..1..0
..0..0..0..1..1..0..0. .0..1..1..1..1..1..1. .1..1..1..1..1..1..1
..0..0..1..0..1..0..1. .0..0..1..1..0..0..1. .0..1..1..1..1..1..1
CROSSREFS
Cf. A304544.
Sequence in context: A304854 A305251 A316551 * A306128 A316310 A317265
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 14 2018
STATUS
approved