A239994 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 or one plus the sum of the elements diagonally to its northwest, modulo 4

2, 13, 190, 6527, 635873, 191691132, 182333502325

Offset

1,1

Comments

Diagonal of A240000

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A378043 A371318 A323209 * A242007 A376550 A049512

Adjacent sequences: A239991 A239992 A239993 * A239995 A239996 A239997

Keyword

nonn

Author

R. H. Hardin, Mar 30 2014

Status

approved