A236876 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median plus the lower median of every 2X2 subblock equal

81, 669, 7900, 316921, 23065072, 6486271600, 3293624294420, 4680935638464133, 12732473276120266961

Offset

1,1

Comments

Diagonal of A236884

Links

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

Example

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

Crossrefs

Sequence in context: A187441 A187433 A269055 * A185366 A232026 A133549

Adjacent sequences: A236873 A236874 A236875 * A236877 A236878 A236879

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved