A212924 Number of n X n 0..n-1 arrays with no column j greater than column j-1 in all rows.

1, 15, 18226, 4041974015, 285912852294921876, 10046278068363977051128904352, 252848108054080530934326716965286554552380, 6218295117529777826597449794390561827118547543121719263231, 195564579665280381327483744593329391511083800439826359765867240005114671403240

Offset: 1

Author

R. H. Hardin, May 31 2012

Keywords

• nonn

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..13

Crossrefs

Diagonal of A212930.