A081158 Number of even cycles in range [A014137(2n-1)..A014138(2n-1)] of permutation A057505/A057506, with no fixed points of A057164.

0, 0, 0, 8, 60, 402, 2474, 14496, 84282, 492048

Offset

0,4

Links

Table of n, a(n) for n=0..9.

Formula

a(n) = A081157(2n) = A081151(n) - A001700(n-1) [where A001700(-1) is taken as 0 here].

Crossrefs

Cf. A081157, A081151, A001700.

Cf. A014137, A014138, A057505, A057506, A057164.

Sequence in context: A250556 A054401 A159727 * A002927 A274800 A126640

Adjacent sequences: A081155 A081156 A081157 * A081159 A081160 A081161

Keyword

nonn,more

Author

Wouter Meeussen and Antti Karttunen, Mar 10 2003

Status

approved