A220207 Number of 4Xn arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 4Xn array

20, 103, 1013, 6855, 42338, 264239, 1594229, 8996095, 47638710, 240437466, 1169737596, 5509527123, 25148632606, 111340824937, 478874919352, 2004763896933, 8184273650104, 32633248916540, 127260159420398

Offset

1,1

Comments

Row 4 of A220204

Links

R. H. Hardin, Table of n, a(n) for n = 1..203

Example

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

Crossrefs

Sequence in context: A126859 A071334 A241355 * A189950 A045768 A088831

Adjacent sequences: A220204 A220205 A220206 * A220208 A220209 A220210

Keyword

nonn

Author

R. H. Hardin Dec 07 2012

Status

approved