A189648 Number of nX7 array permutations with each element moving zero or one space horizontally, diagonally or antidiagonally.

21, 24577, 11047585, 6156828073, 3292827578005, 1778231752192145, 958681588788944613, 517069529154777840681, 278864582730126081862829, 150399411952876520217908417, 81114338143785708962035111845

Offset: 1

Author

R. H. Hardin Apr 24 2011

Keywords

• nonn

Comments

Column 7 of A189650

Examples

			Some solutions for 3X7
..0..7..2..4..3..5.12....0..7.10..2..3..6..5....0..2..3..9..5..4..6
..1..9.15.10.11..6.13....1..9.15.11.19..4.12....1.14.15.10.12.11.19
..8.14.16.17.18.20.19....8.14.16.17.18.13.20....8..7.16.18.17.13.20
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..78