A214100 Number of 0..2 colorings on an nX8 array circular in the 8 direction with new values 0..2 introduced in row major order.

43, 1179, 37441, 1241355, 41634729, 1400634371, 47155766193, 1587939072699, 53475662148217, 1800879393466291, 60647750806896129, 2042420662520443627, 68782159093181338185, 2316362060724569945187, 78007631120858457824081

Offset: 1

Author

R. H. Hardin Jul 04 2012

Keywords

• nonn

Comments

Column 7 of A214101

Examples

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

Links

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

Formula

Empirical: a(n) = 54*a(n-1) -820*a(n-2) +4906*a(n-3) -11803*a(n-4) +11888*a(n-5) -4672*a(n-6) +576*a(n-7)