A203261 Number of nX7 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 508333573, 288459211010972, 52958564655658086303, 7471149797595047377690310, 1180830173140129486377399584664

Offset

1,2

Comments

Column 7 of A203262

Links

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

Example

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

Crossrefs

Sequence in context: A234063 A210155 A348798 * A207041 A339551 A319937

Adjacent sequences: A203258 A203259 A203260 * A203262 A203263 A203264

Keyword

nonn

Author

R. H. Hardin Dec 30 2011

Status

approved