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A297676
Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1's.
0
2, 11, 150, 4633, 401678, 78957968, 41030621948, 49892385650107, 157266548152111938, 1187668466030040777022, 22731639382952184172610914, 1058867886808501107531538859306
OFFSET
1,1
COMMENTS
Diagonal of A297682.
EXAMPLE
Some solutions for n=4
..1..0..0..0. .0..0..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..1
..1..0..0..1. .0..0..0..0. .0..0..0..0. .0..1..0..1. .0..1..0..0
..1..0..0..0. .0..0..0..1. .1..0..0..1. .0..0..0..0. .0..0..1..1
..0..0..1..0. .0..0..0..0. .1..0..0..0. .0..0..1..0. .0..1..0..1
CROSSREFS
Cf. A297682.
Sequence in context: A006122 A111014 A171184 * A049462 A227328 A287149
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2018
STATUS
approved