A214182 Number of 0..6 colorings of an nX4 array circular in the 4 direction with new values 0..6 introduced in row major order.

4, 353, 147943, 96673866, 68272896836, 48807260151073, 34958661918205401, 25047104071770605888, 17946563397124532921734, 12859036484490635332784967, 9213742993368664938803040203, 6601822515414603719492440676662

Offset: 1

Author

R. H. Hardin Jul 07 2012

Keywords

• nonn

Comments

Column 3 of A214187

Examples

			Some solutions for n=4
..0..1..2..3....0..1..0..1....0..1..2..1....0..1..2..1....0..1..0..1
..1..3..1..4....1..0..1..2....1..0..3..4....2..3..4..5....1..0..2..0
..3..1..0..5....0..1..0..1....0..1..2..5....1..2..3..4....2..1..3..1
..5..2..3..4....3..4..5..4....6..0..1..4....5..4..0..6....4..2..1..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 902*a(n-1) -142783*a(n-2) +7297504*a(n-3) -157308287*a(n-4) [phone]*a(n-5) -7002462289*a(n-6) [phone]*a(n-7) -12535263856*a(n-8) [phone]*a(n-9)