A263422 Number of nX4 arrays of permutations of 0..n*4-1 with each element moved a city block distance of 0 or 2.

4, 196, 26244, 1993744, 141086884, 10808097444, 831331827076, 63322713408249, 4821670840815504, 367536797553489424, 28019444925515784976, 2135875239154027938961, 162806957002649300388100

Offset: 1

Author

R. H. Hardin, Oct 17 2015

Keywords

• nonn

Comments

Column 4 of A263424.

Examples

			Some solutions for n=3
..8..9..0..6....0..9.10..1....0..1..7.11....0..3.10.11....8..3..0..6
..1..7..3..2....6..7.11..5....9..5..4..2....4..2..9..7....9..2..1..5
.10..4..5.11....8..4..2..3....8..6.10..3....8..1..5..6...10..4..7.11
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..157

Crossrefs

Cf. A263424.