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A181218
Number of n X n binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally
0
2, 16, 230, 10732, 1495392, 507962194, 493466099722, 1328921689649459, 9633695407844528952, 192630734231370260714836, 10572973250296811381776668634
OFFSET
1,1
COMMENTS
Diagonal of A181224
EXAMPLE
Some avoided solutions for 3X3
..1..1..1....1..0..0....0..0..1....1..1..1....1..0..0....1..1..0....1..0..0
..0..0..0....0..1..1....0..1..0....0..0..1....0..0..0....0..1..0....1..0..0
..0..0..1....0..0..1....1..0..1....0..0..0....1..1..1....0..0..1....1..1..0
CROSSREFS
Sequence in context: A206995 A206779 A233288 * A301581 A376389 A280394
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved