A235973 Number of (n+1) X (n+1) 0..2 arrays with the upper median equal to the lower median in every 2 X 2 subblock.

39, 1473, 143183, 46727365, 45610599689, 147068094657177, 1487588729246707713, 48486777403751460298381, 5004721415407427603880128041

Offset

1,1

Comments

Diagonal of A235981.

Links

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

Example

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

Crossrefs

Cf. A235981.

Sequence in context: A009729 A078970 A020303 * A097314 A162871 A163222

Adjacent sequences: A235970 A235971 A235972 * A235974 A235975 A235976

Keyword

nonn

Author

R. H. Hardin, Jan 17 2014

Status

approved