A238990 Number of n X n 0..3 arrays with no element equal to two plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4

3, 41, 2365, 638779, 860394281, 5929702056895, 212231595626785699, 39651723245559240187169, 38780926340204177325324747343

Offset

1,1

Comments

Diagonal of A238997

Links

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

Example

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

Crossrefs

Sequence in context: A147797 A139161 A262644 * A192888 A239039 A228456

Adjacent sequences: A238987 A238988 A238989 * A238991 A238992 A238993

Keyword

nonn

Author

R. H. Hardin, Mar 08 2014

Status

approved