A235777 Number of (n+1)X(2+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

2612, 68942, 1581879, 30969609, 545929374, 8741113000, 130024832317, 1814248350284, 24045049867402, 304974560820729, 3731440079988996, 44289621774986740, 512802242862242358, 5816732007527994942

Offset

1,1

Comments

Column 2 of A235779

Links

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

Example

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

Crossrefs

Sequence in context: A054258 A236666 A252341 * A235557 A257427 A257420

Adjacent sequences: A235774 A235775 A235776 * A235778 A235779 A235780

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved