A208787 Number of nX7 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any antidiagonal neighbor (colorings ignoring permutations of colors)

877, 76282138, 122941305336223, 1203020866861467699281, 44686267945588240647176350202, 4816230734184037369523912393674851309

Offset

1,1

Comments

Column 7 of A208788

Links

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

Example

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

Crossrefs

Sequence in context: A209464 A209526 A208307 * A208587 A208472 A093943

Adjacent sequences: A208784 A208785 A208786 * A208788 A208789 A208790

Keyword

nonn

Author

R. H. Hardin Mar 01 2012

Status

approved