OFFSET

1,4

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)

LINKS

Bill Butler, More Information

Rachit Agrawal, Java code for this sequence

EXAMPLE

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.

PROG

See Java code text file in the links section.

CROSSREFS

KEYWORD

nonn

AUTHOR

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

STATUS

approved