A239645 Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it, modulo 4

16, 418, 12246, 320314, 8634040, 232304146, 6219477628, 167002115382, 4480024646968, 120194161637198, 3224850795644656, 86521373598621284, 2321331783000405634, 62280781184357139014, 1670970691795092353254

Offset

1,1

Comments

Column 4 of A239649

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A264169 A223780 A223714 * A349966 A143039 A281952

Adjacent sequences: A239642 A239643 A239644 * A239646 A239647 A239648

Keyword

nonn

Author

R. H. Hardin, Mar 23 2014

Status

approved