A194495 Number of ways to arrange 5 nonattacking queens on the lower triangle of an n X n board.

0, 0, 0, 0, 0, 0, 4, 114, 1384, 9890, 50662, 205512, 698688, 2074530, 5525902, 13476246, 30522678, 64968996, 131070600, 252492296, 467017054, 833501728, 1440839952, 2420878990, 3964168632, 6342428908, 9934738024, 15264432954

Offset: 1

Author

R. H. Hardin Aug 26 2011

Keywords

• nonn

Comments

Column 5 of A194498

Examples

			All solutions for 7X7
..0..............0..............0..............0
..0.0............0.0............0.0............0.0
..1.0.0..........0.1.0..........1.0.0..........0.0.1
..0.0.0.1........0.0.0.1........0.0.1.0........1.0.0.0
..0.1.0.0.0......1.0.0.0.0......0.0.0.0.1......0.0.0.1.0
..0.0.0.0.1.0....0.0.1.0.0.0....0.1.0.0.0.0....0.1.0.0.0.0
..0.0.1.0.0.0.0..0.0.0.0.1.0.0..0.0.0.1.0.0.0..0.0.0.0.1.0.0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..49