A202915 Number of nX7 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor

45648, 66085464308, 43681585962838352, 22397115742156661223732, 12023921497279230314645570796, 6613658872365063161591092431692334

Offset

1,1

Comments

Column 7 of A202916

Links

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

Example

Some solutions for n=4
..1..2..5..3..4..1..0....2..5..7..7..3..6..3....1..7..0..0..5..3..2
..1..4..5..4..4..3..4....1..7..3..1..7..6..6....2..7..6..6..5..1..4
..3..3..3..2..4..2..4....7..7..2..4..7..0..6....5..1..6..2..5..0..4
..0..5..5..1..7..7..5....2..2..0..3..1..6..6....7..7..4..1..5..1..0

Crossrefs

Sequence in context: A251397 A184473 A157653 * A257358 A232255 A031841

Adjacent sequences: A202912 A202913 A202914 * A202916 A202917 A202918

Keyword

nonn

Author

R. H. Hardin Dec 26 2011

Status

approved