A236974 Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal

1238, 9854, 76212, 635960, 5259146, 44597946, 376887360, 3222991866, 27520095568, 236568864708, 2032537681056, 17535842104346, 151294565594066, 1308890744507700, 11327010592855074, 98206225621215244, 851830423648769622

Offset

1,1

Comments

Column 2 of A236979

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A179913 A161868 A145047 * A237552 A010081 A028514

Adjacent sequences: A236971 A236972 A236973 * A236975 A236976 A236977

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved