A187865 Number of 10-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.

0, 0, 0, 219008, 6387404, 38766870, 133665550, 327612556, 658127610, 1150253908, 1821396586, 2678117739, 3721029612, 4946379865, 6353213493, 7935533922, 9694577705, 11627337878, 13734354068, 16015165378, 18469771808, 21098173358

Offset: 1

Author

R. H. Hardin Mar 14 2011

Keywords

• nonn

Comments

Row 10 of A187857

Examples

			Some solutions for 4X4
..0..9..0..0....9..8..3..2....0..9..8..5....0..0..6..0....0..1.10..2
..7..3..8..0....0..7..0..1....0..4..1..7....4..1..5..8....9..4..0..0
..0..6..2.10...10..4..6..5...10..3..0..6....3..7..0.10....0..8..3..0
..1..0..5..4....0..0..0..0....0..0..2..0....0..2..0..9....5..7..6..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..50

Formula

Empirical: a(n) = 86897560*n^2 - 1108193530*n + 3420011978 for n>17