A265454 Number of nX4 0..n+4-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

66, 3358, 216466, 13943772, 871209026, 52509347006, 3073046007824, 175659478218938, 9853875472731614, 544420779803461484, 29705625866016751450, 1604088383366277766514, 85864081342833064010380

Offset: 1

Author

R. H. Hardin, Dec 09 2015

Keywords

• nonn

Comments

Column 4 of A265458.

Examples

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

Links

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

Crossrefs

Cf. A265458.