A239398 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4.

2, 23, 1337, 394509, 614216271, 5072216819342, 217822754771248124, 49235710631611399112515, 58260708510317695923927600575

Offset: 1

Author

R. H. Hardin, Mar 17 2014

Keywords

• nonn

Comments

Diagonal of A239405.

Examples

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

Crossrefs

Cf. A239405.