login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A279116 Number of non-equivalent ways to place 7 non-attacking kings on an n X n board. 7
0, 0, 0, 0, 39, 6472, 311552, 5576682, 56289710, 389130774, 2059061646, 8924241327, 33134160010, 108698226956, 322211640480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Rotations and reflections of placements are not counted. If they are to be counted, see A194788.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

There are 39 non-equivalent ways to place 7 non-attacking kings on a 5 X 5 board, e.g., this one:

   K...K

   .....

   K.K.K

   .....

   K...K

CROSSREFS

Cf. A194788, A279111 (2 kings), A279112 (3 kings), A279113 (4 kings), A279114 (5 kings), A279115 (6 kings), A279117, A236679.

Sequence in context: A027490 A323688 A266453 * A266307 A210327 A174765

Adjacent sequences:  A279113 A279114 A279115 * A279117 A279118 A279119

KEYWORD

nonn,more

AUTHOR

Heinrich Ludwig, Dec 10 2016

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 April 18 12:42 EDT 2019. Contains 322209 sequences. (Running on oeis4.)