A133143 Maximal number of mutually nonattacking Super Queens on an n X n board. (A Super Queen is a queen with both queen and knight powers.)

1, 1, 1, 2, 4, 4, 5, 6, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Offset: 1

Author

Rachit Agrawal (rachit_agrawal(AT)daiict.ac.in), Dec 16 2007

Keywords

• nonn

Comments

From Vaclav Kotesovec, Mar 14 2011: (Start)

For n >= 10, a(n)=n, see A051223.

For same problem on a toroidal chessboard the results for n > 10 are the same as for queens (A085801). (End)

Examples

			a(4) = 2:
|X|0|0|0|
|0|0|0|X|
|0|0|0|0|
|0|0|0|0|
where X denotes the place of a Super Queen.
		

Links

• Bill Butler, More Information
• Rachit Agrawal, Java code for this sequence

Programs

Java

// See Java code text file in the links section.