A277769 Number of 4Xn 0..2 arrays with every element equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0) both plus 1 mod 3 and minus 1 mod 3, with new values introduced in order 0..2.

0, 14, 330, 9741, 275018, 7824415, 221983169, 6298326387, 178728649865, 5071423132367, 143902812077769, 4083281399156407, 115864087742823865, 3287671351656190808, 93288470977649320614, 2647082885606708742103

Offset: 1

Author

R. H. Hardin, Oct 29 2016

Keywords

• nonn

Comments

Row 4 of A277767.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 98

Crossrefs

Cf. A277767.

Formula

Empirical recurrence of order 98 (see link above)