A214161 Number of 0..5 colorings of an nX4 array circular in the 4 direction with new values 0..5 introduced in row major order.

4, 337, 88261, 27240856, 8548472292, 2687052137887, 844765198701963, 265584804041291390, 83497056404973808506, 26250596837942857641941, 8252911849410478325131985, 2594628782449337737766700740

Offset: 1

Author

R. H. Hardin Jul 05 2012

Keywords

• nonn

Comments

Column 3 of A214166

Examples

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

Links

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

Formula

Empirical: a(n) = 370*a(n-1) -18411*a(n-2) +297448*a(n-3) -1839799*a(n-4) +4424682*a(n-5) -4113757*a(n-6) +1249468*a(n-7)