A235778 Number of (n+1) X (3+1) 0..3 arrays with the sum of each 2 X 2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

23024, 1581879, 101237218, 5639406769, 284827103857, 12969746978427, 542604984360890, 20967636062967018, 756914723702877353, 25670260853234070465, 824040021622030909676, 25151768078055048000358

Offset

1,1

Comments

Column 3 of A235779.

Links

R. H. Hardin, Table of n, a(n) for n = 1..34

Example

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

Crossrefs

Cf. A235779.

Sequence in context: A257205 A236039 A116062 * A235558 A104077 A199811

Adjacent sequences: A235775 A235776 A235777 * A235779 A235780 A235781

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved