A203505 Number of nX7 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 138035591, 33576251318216, 2766231303166191786, 184087747131825069346215, 13871923767653971368743823518

Offset

1,2

Comments

Column 7 of A203506

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=5
..1..1..1..3..6..6..3....0..1..1..0..5..0..2....2..4..6..1..5..5..3
..0..6..4..1..2..6..3....2..3..3..1..5..4..4....6..4..6..6..0..5..5
..3..6..5..4..1..2..3....0..1..4..1..6..2..6....6..3..4..5..1..5..0
..4..6..3..3..5..2..0....5..3..4..3..6..6..6....6..4..2..4..1..6..1
..2..6..6..2..5..5..2....5..5..4..6..6..6..6....6..6..6..6..6..6..6

Crossrefs

Sequence in context: A185888 A105297 A298729 * A342214 A251505 A034642

Adjacent sequences: A203502 A203503 A203504 * A203506 A203507 A203508

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved