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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
OFFSET
1,5
COMMENTS
Rotations and reflections of placements are not counted. If they are to be counted, see A194788.
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
KEYWORD
nonn,more
AUTHOR
Heinrich Ludwig, Dec 10 2016
STATUS
approved