A239857 Number of nX7 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

20, 100, 1382, 9963, 77212, 937154, 9885999, 147826427, 2030390429, 28426183961

Offset

1,1

Comments

Column 7 of A239858

Links

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

Example

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

Crossrefs

Sequence in context: A027986 A240437 A174078 * A041772 A043462 A044271

Adjacent sequences: A239854 A239855 A239856 * A239858 A239859 A239860

Keyword

nonn

Author

R. H. Hardin, Mar 28 2014

Status

approved