A221242 Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.

4, 484, 45369, 4096576, 367565584, 32940435025, 2951293792489, 264404315544196, 23687401278880161, 2122092173450945536, 190112409243526686921, 17031641464052384231241, 1525817148915719009233321

Offset: 1

Author

R. H. Hardin Jan 06 2013

Keywords

• nonn

Comments

Column 4 of A221245

Examples

			Some solutions for n=3
..1..0..3..0....0..1..2..0....0..0..1..0....1..1..1..1....0..0..2..0
..1..4..1..0....0..0..1..1....1..2..0..2....1..3..0..1....2..1..1..2
..0..0..0..2....1..2..2..2....0..2..4..0....1..0..2..0....0..2..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..21

Formula

Empirical: a(n) = 148*a(n-1) -6427*a(n-2) +118138*a(n-3) -1053200*a(n-4) +4793575*a(n-5) -11306353*a(n-6) [phone]*a(n-7) -7161939*a(n-8) +1435401*a(n-9) -59049*a(n-10)