A224124 Number of 2Xn 0..3 arrays with row sums nondecreasing and column sums unimodal.

10, 150, 1747, 16782, 140210, 1050460, 7227405, 46371039, 281020959, 1623035066, 9002891450, 48234712165, 250875276249, 1271548675730, 6302249244967, 30627310088497, 146302624587552, 688283767932118, 3194839035650041

Offset: 1

Author

R. H. Hardin Mar 31 2013

Keywords

• nonn

Comments

Row 2 of A224123

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..72