login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A178986 Number of ways to place n nonattacking amazons (superqueens) on an n X n toroidal board. 0
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 44, 0, 1092, 0, 0, 0, 16932, 0, 24776, 0, 0, 0, 1881492, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

COMMENTS

An amazon (superqueen) moves like a queen and a knight.

LINKS

Table of n, a(n) for n=1..24.

V. Kotesovec, Non-attacking chess pieces, 6ed, 2013.

Paul Monsky, Superqueens: Problem E3162, American Mathematical Monthly, vol. 96 (1989), p.258-259.

CROSSREFS

Cf. A051223, A051906, A085801, A000170, A178975.

Sequence in context: A023933 A271141 A022075 * A174730 A037939 A040010

Adjacent sequences:  A178983 A178984 A178985 * A178987 A178988 A178989

KEYWORD

nonn,more

AUTHOR

Vaclav Kotesovec, Jan 03 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 27 15:14 EST 2020. Contains 331295 sequences. (Running on oeis4.)