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A134983 Number of ways of placing n rooks on an n X n chessboard with the topology of a Klein bottle. 0
1, 2, 4, 12, 40, 168, 784, 4272, 25504, 171168, 1242688, 9915072, 84714112, 783454848, 7697178880 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..15.
R. W. Whitty, Rook polynomials on two-dimensional surfaces and graceful labellings of graphs, Discrete Math., 308 (2008), 674-683.
CROSSREFS
Sequence in context: A188479 A062962 A033472 * A330679 A342225 A218144
Adjacent sequences: A134980 A134981 A134982 * A134984 A134985 A134986
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 08 2008
STATUS
approved

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Last modified July 18 18:59 EDT 2024. Contains 374388 sequences. (Running on oeis4.)