A219685 Number of n X 7 arrays of the minimum value of corresponding elements and their horizontal, vertical, or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 7 array.

28, 44, 922, 15763, 219216, 2709320, 35011623, 479633094, 6609458081, 87609413453, 1101888673326, 13242315279610, 153674552267213, 1731915355340898, 18978190461636053, 202216531650350001

Offset

1,1

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Column 7 of A219686.

Sequence in context: A260954 A349495 A169962 * A180045 A144581 A075875

Adjacent sequences: A219682 A219683 A219684 * A219686 A219687 A219688

Keyword

nonn,more

Author

R. H. Hardin, Nov 25 2012

Status

approved