A241428 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

2, 5, 22, 515, 7495, 377314, 79901137, 34796682706

Offset

1,1

Comments

Diagonal of A241435

Links

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

Example

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

Crossrefs

Sequence in context: A326959 A034384 A078419 * A342386 A374402 A070281

Adjacent sequences: A241425 A241426 A241427 * A241429 A241430 A241431

Keyword

nonn

Author

R. H. Hardin, Apr 22 2014

Status

approved