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A296592
Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1, 2 or 3 neighboring 1's.
1
1, 11, 228, 16524, 4254377, 3553672817, 10046940260800, 95593682736547484, 3048748598852691707372, 326806923379819512235330165, 117671612236955708975981838902711
OFFSET
1,2
COMMENTS
Diagonal of A296599.
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1. .0..1..1..0. .1..0..0..0. .0..0..0..0. .1..0..1..0
..1..0..1..1. .0..0..1..1. .1..0..1..0. .1..0..1..1. .1..0..1..0
..1..0..0..1. .0..1..0..1. .1..0..1..1. .1..0..1..0. .1..0..1..0
..0..0..1..1. .1..0..1..1. .1..1..0..1. .1..1..0..0. .0..1..1..1
CROSSREFS
Cf. A296599.
Sequence in context: A120850 A289716 A305141 * A108518 A346423 A077736
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2017
STATUS
approved