login
A299136
Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
0
0, 4, 129, 11179, 3426869, 3643124959, 13311860331263, 167720233672628013, 7285451454600766025388
OFFSET
1,2
COMMENTS
Diagonal of A299142.
EXAMPLE
Some solutions for n=5
..0..0..0..0..1. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..1
..0..0..1..1..0. .0..1..0..1..0. .0..0..0..0..0. .0..0..0..1..1
..0..1..1..0..0. .1..0..0..1..0. .0..1..0..0..1. .1..0..0..0..1
..1..1..1..0..1. .1..0..1..1..0. .0..1..1..0..1. .1..1..1..0..1
..0..0..1..1..0. .1..1..0..0..1. .1..1..1..0..1. .1..1..0..1..0
CROSSREFS
Cf. A299142.
Sequence in context: A041495 A188315 A298274 * A117897 A001425 A050284
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 03 2018
STATUS
approved