A229513 Number of n X n 0..2 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X (n+1) 0..2 array without adjacent equal elements in the latter.

3, 33, 775, 34151, 3336437, 701321971, 329002027139, 336641338602285, 765068159631612145

Offset

1,1

Comments

Diagonal of A229521.

Links

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

Example

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

Crossrefs

Cf. A229521.

Sequence in context: A003715 A247030 A009690 * A210833 A174488 A289695

Adjacent sequences: A229510 A229511 A229512 * A229514 A229515 A229516

Keyword

nonn

Author

R. H. Hardin, Sep 25 2013

Status

approved