A240186 Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.

1, 5, 37, 771, 91879, 28061567, 43398047802

Offset

1,2

Comments

Diagonal of A240192.

Links

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

Example

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

Crossrefs

Cf. A240192.

Sequence in context: A336241 A180275 A257952 * A003213 A166851 A090439

Adjacent sequences: A240183 A240184 A240185 * A240187 A240188 A240189

Keyword

nonn

Author

R. H. Hardin, Apr 02 2014

Status

approved