A241248 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4

2, 5, 13, 120, 3404, 124372, 13138271, 8317272277

Offset

1,1

Comments

Diagonal of A241255

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A090472 A120266 A230518 * A275698 A186450 A065797

Adjacent sequences: A241245 A241246 A241247 * A241249 A241250 A241251

Keyword

nonn

Author

R. H. Hardin, Apr 18 2014

Status

approved