A203260 Number of n X 6 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor.

1, 24301646, 1956615126953, 60474221730991631, 1502693979789746374595, 40799258353982022255077487, 1180830173140129486377399584664, 33919060341473924740618271770680506

Offset

1,2

Comments

Column 6 of A203262.

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

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

Crossrefs

Cf. A203262.

Sequence in context: A058323 A251248 A135954 * A268290 A183791 A115533

Adjacent sequences: A203257 A203258 A203259 * A203261 A203262 A203263

Keyword

nonn

Author

R. H. Hardin, Dec 30 2011

Status

approved