A214233 Number of 0..7 colorings of an nX4 array circular in the 4 direction with new values 0..7 introduced in row major order.

4, 354, 175884, 188834753, 253155125338, 356734116034266, 508116551730888266, 725424852023224352701, 1036196988923824970841964, 1480269108515044158376950586, 2114704441343238968833690030736

Offset: 1

Author

R. H. Hardin Jul 08 2012

Keywords

• nonn

Comments

Column 3 of A214238

Examples

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

Links

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

Formula

Empirical: a(n) = 1953*a(n-1) -829512*a(n-2) [phone]*a(n-3) -7217451834*a(n-4) [phone]*a(n-5) -3163113776744*a(n-6) [phone]*a(n-7) -99982144638429*a(n-8) [phone]*a(n-9) -161723079970872*a(n-10) [phone]*a(n-11)