A228973 Number of nX3 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)X4 0..2 array.

27, 729, 19503, 485397, 11824875, 284888979, 6833010879, 163568332743, 3912114851403, 93531877981317, 2235810654452229, 53441462708600373, 1277342856184156383, 30530250826564614987, 729710332031305316823

Offset

1,1

Comments

Column 3 of A228977.

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

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

Crossrefs

Sequence in context: A167726 A268022 A223571 * A171301 A098838 A268015

Adjacent sequences: A228970 A228971 A228972 * A228974 A228975 A228976

Keyword

nonn

Author

R. H. Hardin, Sep 10 2013

Status

approved