A239985 Number of nX7 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 or one plus the sum of the elements diagonally to its northwest, modulo 4

1, 8, 107, 4059, 131242, 4803152, 226886115, 9004871354, 404795616742, 19130966325023

Offset

1,2

Comments

Column 7 of A239986

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A199658 A027013 A365818 * A274892 A105261 A187288

Adjacent sequences: A239982 A239983 A239984 * A239986 A239987 A239988

Keyword

nonn

Author

R. H. Hardin, Mar 30 2014

Status

approved