A219372 Number of n X 7 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 7 array.

84, 2748, 811802, 174413126, 28236528076, 3886911446418

Offset

1,1

Comments

Column 7 of A219373.

Links

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

Example

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

Crossrefs

Cf. A219373.

Sequence in context: A219584 A140903 A219470 * A026809 A114253 A017800

Adjacent sequences: A219369 A219370 A219371 * A219373 A219374 A219375

Keyword

nonn

Author

R. H. Hardin, Nov 19 2012

Status

approved