A267752 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north neighbor modulo 4 and the upper left element equal to 0.

1, 8, 118, 2386, 54956, 1350674, 34568612, 910791802, 24537293344, 672857207788, 18718820026952, 527018609703106, 14988164468962816, 429939684328203092, 12424959589420164728, 361409602487910188762, 10572662501852062471576

Offset: 1

Author

R. H. Hardin, Jan 20 2016

Keywords

• nonn

Comments

Row 4 of A267751.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..40

Crossrefs

Cf. A267751.