A214110 Number of 0..3 colorings on an nX7 array circular in the 7 direction with new values 0..3 introduced in row major order.

91, 34041, 12777541, 4797577911, 1801391900581, 676387200779521, 253970131976197721, 95360806682222518731, 35806113871482016834611, 13444493973598029022988181, 5048143980581518949006312711

Offset: 1

Author

R. H. Hardin Jul 04 2012

Keywords

• nonn

Comments

Column 6 of A214112

Examples

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

Links

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

Formula

Empirical: a(n) = 416*a(n-1) -15454*a(n-2) +89758*a(n-3) +90848*a(n-4) -438718*a(n-5) +62801*a(n-6)