A212946 Number of 4Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows.

1, 175, 331489, 2509306671, 52311221188001, 2438624218076957695, 221920456466342315024785, 35805749325509532346413477679, 9531951779328890331855321215698177

Offset: 1

Author

R. H. Hardin May 31 2012

Keywords

• nonn

Comments

Row 4 of A212943

Examples

			Some solutions for n=4
..3..3..2..1....1..3..2..1....2..1..1..1....3..3..0..0....0..0..1..0
..3..2..2..2....1..1..0..3....0..2..1..3....3..3..3..2....2..2..0..1
..2..3..2..2....2..3..3..0....3..1..2..0....1..0..1..0....3..2..0..0
..3..1..1..2....1..0..3..0....2..2..1..2....1..1..0..3....0..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18