OFFSET
4,1
LINKS
Erich Friedman, Problem of the month July 2011
EXAMPLE
There are 64 ways to place 5 different chess pieces on an 8 X 8 chessboard with the above condition.
An example for a 4 X 4 board is
...Q
..NK
B...
R...
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Kausthub Gudipati, Sep 25 2011
STATUS
approved