A218644 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X n array.

4, 16, 610, 82188, 45453172, 99181510254, 817394844786996, 26269231937922520406

Offset

1,1

Comments

Diagonal of A218651.

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Cf. A218651.

Sequence in context: A013006 A013001 A373739 * A013179 A144177 A300315

Adjacent sequences: A218641 A218642 A218643 * A218645 A218646 A218647

Keyword

nonn

Author

R. H. Hardin, Nov 03 2012

Status

approved