A214144 Number of 0..4 colorings of a 3X(n+1) array circular in the n+1 direction with new values 0..4 introduced in row major order.

33, 514, 28278, 1101051, 47730973, 2000093424, 84746307320, 3577656763765, 151219261926083, 6389075487200098, 269978080214894342, 11407722800807664903, 482032317577423439601, 20368126430994060884676

Offset: 1

Author

R. H. Hardin Jul 05 2012

Keywords

• nonn

Comments

Row 3 of A214141

Examples

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

Links

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

Formula

Empirical: a(n) = 29*a(n-1) +667*a(n-2) -3517*a(n-3) -48855*a(n-4) +260073*a(n-5) +877261*a(n-6) -6916959*a(n-7) +3304148*a(n-8) [phone]*a(n-9) -103934388*a(n-10) +3498864*a(n-11) [phone]*a(n-12) -66186464*a(n-13) -37655040*a(n-14) [phone]*a(n-15)