A189434 Number of nX8 array permutations with each element not moving, or moving one space N, SW or SE.

1, 34, 1165, 42205, 1940868, 79826592, 3467525301, 150293731826, 6540976400913, 285499775348185, 12468705796935816, 545183904690537217, 23847514960230618480, 1043490861604911009586, 45668994694128002511925

Offset: 1

Author

R. H. Hardin Apr 22 2011

Keywords

• nonn

Comments

Column 8 of A189435

Examples

			Some solutions for 3X8
..8..9.10.11..4.13.14..7....0..1..2..3..4..5..6..7....0..1..2..3..4..5..6..7
..1..0..3..2..5.21.22..6...16.17.18.19.12.13.22.23....8..9.18.19.12.13.14.15
.16.17.18.19.20.12.15.23....9..8.11.10.20.21.15.14...16.17.11.10.20.21.22.23
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..50