A188955 Number of nX4 array permutations with each element moved no more than a city block distance of two.

14, 3969, 1722256, 504690017, 151700751624, 47085945014364, 14529766291673016, 4473345039125385924, 1378237965469881319638, 424709806495811992908136, 130865875276447905156349870, 40323080903656724639859869876

Offset: 1

Author

R. H. Hardin Apr 14 2011

Keywords

• nonn

Comments

Column 4 of A188958

Examples

			Some solutions for 3X4
..0..2..5..7....0..2..1..3....0..4..1..2....0..2..3..1....0..2..3..1
..6..1..9.11....8..4.10..5....6..8..7..3....8..6.11..5....4.10..9..5
.10..4..8..3....9..6.11..7...10.11..5..9...10..4..7..9....8.11..7..6
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..52