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A295840
Number of n X n 0..1 arrays with each 1 adjacent to 1 or 2 king-move neighboring 1's.
0
1, 11, 104, 3472, 333366, 68406015, 39611268638, 58299712744084, 215161140627491789, 2072082954330213350831, 50904335335986557283096575, 3201040036319851813019243143047
OFFSET
1,2
COMMENTS
Diagonal of A295847.
EXAMPLE
Some solutions for n=4
..0..0..0..1. .0..1..1..1. .1..1..0..1. .0..1..1..0. .0..0..0..1
..0..0..0..1. .1..0..0..0. .1..0..0..1. .0..0..0..1. .0..0..0..1
..0..1..0..0. .1..0..1..0. .0..0..1..0. .1..1..0..1. .0..0..0..0
..1..0..1..0. .1..0..0..1. .1..1..0..0. .0..0..0..0. .0..0..1..1
CROSSREFS
Cf. A295847.
Sequence in context: A356128 A173851 A358340 * A158470 A372146 A163933
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2017
STATUS
approved