A219577 Number of nX7 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX7 array.

84, 881, 82431, 7579137, 572032559

Offset

1,1

Comments

Column 7 of A219578

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A219827 A219719 A069080 * A093284 A027794 A219713

Adjacent sequences: A219574 A219575 A219576 * A219578 A219579 A219580

Keyword

nonn

Author

R. H. Hardin, Nov 23 2012

Status

approved