A224308 Number of nX6 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

148, 4690, 61953, 562760, 4420701, 33934344, 268379906, 2215451575, 19023816444, 168305254414, 1519045558334, 13877824165049, 127654546150864, 1178500994429585, 10900361047173008, 100920807678845030

Offset: 1

Author

R. H. Hardin Apr 03 2013

Keywords

• nonn

Comments

Column 6 of A224310

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 88

Formula

Empirical recurrence of order 88 (see link above)