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

1,4

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

Table of n, a(n) for n=1..20.

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

Sequence in context: A140201 A351393 A057861 * A085898 A058679 A058568

Adjacent sequences: A133140 A133141 A133142 * A133144 A133145 A133146

Keyword

nonn

Author

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

Status

approved