A195897 Number of ways to place a queen, a rook, a bishop, a knight and a king on an n X n chessboard such that each piece attacks the same number of unoccupied spaces.

28, 39, 90, 63, 64, 197, 15, 7, 5, 1

Offset

4,1

Links

Table of n, a(n) for n=4..13.

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

Sequence in context: A204822 A179166 A034964 * A109798 A216594 A324858

Adjacent sequences: A195894 A195895 A195896 * A195898 A195899 A195900

Keyword

fini,full,nonn

Author

Kausthub Gudipati, Sep 25 2011

Status

approved