A228971 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.

3, 81, 19503, 32175213, 340872730929, 23319328706411649, 10480310456719980450885

Offset

1,1

Comments

Diagonal of A228977.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..2
..0..0..2..1....0..0..2..1....0..0..1..0....0..0..0..0....0..0..0..1
..1..2..1..1....1..2..2..2....2..0..1..2....1..1..1..1....0..2..2..2
..2..0..1..1....2..0..0..0....1..0..2..1....2..2..1..0....1..2..2..2

Crossrefs

Sequence in context: A207311 A206693 A223570 * A060722 A183502 A325053

Adjacent sequences: A228968 A228969 A228970 * A228972 A228973 A228974

Keyword

nonn

Author

R. H. Hardin, Sep 10 2013

Status

approved