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A102388
Number of ways of placing n nonattacking Queens of the Night on an n X n board.
10
1, 0, 0, 0, 0, 0, 0, 0, 0, 4, 44, 6, 78, 8, 16, 18, 234, 124, 468, 516, 882, 2092, 7068, 22794, 85456, 275732, 974048, 3698242, 14120996, 59531852, 252272512, 1163430462, 5229335374
OFFSET
1,10
COMMENTS
A Queen of the Night can move like a Queen or a Nightrider, which is a rider along straight lines of Knight moves.
LINKS
Noam D. Elkies, Chess Pages and Links.
P. Syski, S. J. Wernli, Queen of the Night on an n X n board.
V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p. 350.
W. Schubert, N-Queens page.
PROG
See C++ code on website.
CROSSREFS
KEYWORD
nonn,hard,more,nice
AUTHOR
Stefan Wernli, Peter Syski (swernli(AT)fas.harvard.edu), Jan 07 2005
EXTENSIONS
Terms a(20)-a(28) from Vaclav Kotesovec, Jun 18 2010 and Feb 02 2011
Terms a(29)-a(32) from Wolfram Schubert, Jul 24 2011
Term a(33) from Wolfram Schubert, May 27 2012
STATUS
approved