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

1,1

Comments

Diagonal of A239405.

Links

Table of n, a(n) for n=1..9.

Example

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.

Sequence in context: A378113 A266992 A079480 * A239811 A082963 A083759

Adjacent sequences: A239395 A239396 A239397 * A239399 A239400 A239401

Keyword

nonn

Author

R. H. Hardin, Mar 17 2014

Status

approved