A245011 - OEIS

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A245011

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

1

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

A princess moves like a bishop and a knight.

LINKS

Table of n, a(n) for n=1..12.

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.

Sequence in context: A213335 A101138 A222483 * A375671 A012897 A013079

Adjacent sequences: A245008 A245009 A245010 * A245012 A245013 A245014

KEYWORD

nonn,hard,more

AUTHOR

Vaclav Kotesovec, Sep 16 2014

STATUS

approved