A229373 Number of n X n 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 diagonally or antidiagonally.

3, 30, 956, 78690, 20014278, 13999334726, 29757371834046, 174511010613631514, 3123774881474924676470, 153541601581149110702908096, 23150533101205838897343355257558, 9547382122506738591063952302014235288

Offset: 1

Author

R. H. Hardin Sep 21 2013

Keywords

• nonn

Comments

Diagonal of A229380.

Examples

			Some solutions for n=4
..1..0..1..0....2..0..0..2....2..0..2..1....1..2..2..1....1..2..1..2
..1..0..1..0....1..2..2..1....1..0..1..2....2..0..1..0....0..0..0..0
..2..0..1..2....1..0..1..2....1..0..1..0....1..0..2..0....2..1..2..1
..1..2..2..1....1..2..1..0....2..0..1..2....1..0..1..2....0..0..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..13

Crossrefs

Cf. A229380.