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A295410
Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 1, 2 or 3 1's.
1
1, 10, 234, 19026, 5741797, 6093564449, 23025368248778, 309978055996363953, 14848281990251202621848, 2531566579339095935434773023, 1536279445900820560553369496441851
OFFSET
1,2
COMMENTS
Diagonal of A295416.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..0. .0..0..0..0..1. .0..0..0..0..1. .1..0..0..0..0
..1..1..1..0..0. .0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..0
..0..1..0..1..0. .1..1..0..1..0. .1..1..1..0..0. .0..1..0..0..0
..0..1..0..1..1. .1..0..0..1..0. .0..1..1..0..0. .0..1..0..1..1
CROSSREFS
Cf. A295416.
Sequence in context: A087434 A297648 A012240 * A188679 A167867 A268080
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2017
STATUS
approved