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 A096471 Number of degree-n permutations with exactly one even cycle. 1
 1, 3, 12, 60, 345, 2415, 18480, 166320, 1596105, 17557155, 202951980, 2638375740, 35703612945, 535554194175, 8307234936000, 141222993912000, 2470641012464625, 46942179236827875, 914462992955011500 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 LINKS Robert Israel, Table of n, a(n) for n = 2..449 FORMULA E.g.f.: -1/2*((1+x)/(1-x))^(1/2)*log(1-x^2). MAPLE S:= series(-1/2*((1+x)/(1-x))^(1/2)*log(1-x^2), x, 51): seq(coeff(S, x, n)*n!, n=2..50); # Robert Israel, Nov 13 2017 CROSSREFS Cf. A060523, A028353. Sequence in context: A092803 A181282 A020052 * A140097 A105227 A000258 Adjacent sequences:  A096468 A096469 A096470 * A096472 A096473 A096474 KEYWORD easy,nonn AUTHOR Vladeta Jovovic, Aug 13 2004 STATUS approved

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Last modified April 14 01:49 EDT 2021. Contains 342941 sequences. (Running on oeis4.)