A264066 Number of (n+1) X (n+1) arrays of permutations of 0..(n+1)^2-1 with each element having index change +-(.,.) 0,0 1,1 or 1,2.

2, 21, 1210, 239580, 242621698, 1084282319384, 23180312098708413, 2169349966829797899136

Offset: 1

Author

R. H. Hardin, Nov 02 2015

Keywords

• nonn

Examples

			Some solutions for n=3:
..6..1..7..3....5..1..7..3....6..1..7..3....0..1..2..3....0..6..2..3
.10.11..0..2....9.11..0..2....4..5..0..2...10..5..6..7....4.11..1..7
..8..9..4..5....8.15..4..6...14.15.10.11...13..4.15.11....8.14.15..5
.12.13.14.15...12.13.14.10...12.13..8..9...12..8.14..9...12.13..9.10
		

Crossrefs

Main diagonal of A264071.