A224198 Number of n X n 0..3 arrays with rows unimodal and antidiagonals nondecreasing.

4, 160, 16060, 2411246, 451319098, 96914926654, 22835261226043, 5750097317505437, 1521786116504544601, 418628292901694453231, 118789461093773656747975, 34580941641153629118242103

Offset: 1

Author

R. H. Hardin, Apr 01 2013

Keywords

• nonn

Comments

Diagonal of A224204.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..17

Crossrefs

Cf. A224204.