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A060307
Number of degree-4n permutations without odd cycles and such that number of cycles of size 2k is even (or zero) for every k.
+0
4
1, 3, 1365, 8534295, 204893714025, 15735481638151275, 2760485970394430603325, 1006427270776555103089989375, 659316841888260316767029819420625
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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