A218515 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..3 n X n array

4, 36, 4634, 1608968, 3856183182, 40522780697742, 2345237392530015812, 681081741849413830473468, 1012037226170162671485394009190

Offset

1,1

Comments

Diagonal of A218522

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A179870 A001152 A349848 * A296136 A061024 A297105

Adjacent sequences: A218512 A218513 A218514 * A218516 A218517 A218518

Keyword

nonn

Author

R. H. Hardin Oct 31 2012

Status

approved