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%I #9 Dec 21 2016 12:18:26
%S 0,0,0,0,39,6472,311552,5576682,56289710,389130774,2059061646,
%T 8924241327,33134160010,108698226956,322211640480
%N Number of non-equivalent ways to place 7 non-attacking kings on an n X n board.
%C Rotations and reflections of placements are not counted. If they are to be counted, see A194788.
%e There are 39 non-equivalent ways to place 7 non-attacking kings on a 5 X 5 board, e.g., this one:
%e K...K
%e .....
%e K.K.K
%e .....
%e K...K
%Y Cf. A194788, A279111 (2 kings), A279112 (3 kings), A279113 (4 kings), A279114 (5 kings), A279115 (6 kings), A279117, A236679.
%K nonn,more
%O 1,5
%A _Heinrich Ludwig_, Dec 10 2016
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