A245011 Number of ways to place n nonattacking princesses on an n X n board.

1, 4, 6, 86, 854, 9556, 146168, 2660326, 56083228, 1349544632, 36786865968, 1117327217782

Offset: 1

Author

Vaclav Kotesovec, Sep 16 2014

Keywords

• nonn
• hard
• more

Comments

A princess moves like a bishop and a knight.

Links

• V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p. 744.
• Wikipedia, Fairy chess piece

Crossrefs

Cf. A201513, A000170, A002465, A201540.

Cf. A185085, A051223, A244284, A201511, A201861, A137774.

Cf. A225555.