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A081151 Number of even cycles in range [A014137(2n-1)..A014138(2n-1)] of permutation A057505/A057506. 5
0, 1, 3, 18, 95, 528, 2936, 16212, 90717, 516358, 2979992 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Equal to the number of all cycles in the same range (after n>0).

LINKS

Table of n, a(n) for n=0..10.

CROSSREFS

a(n) = A081150(2n) = A081158(n)+A001700(n-1) [where A001700(-1) is taken as 0 here] = A057507(2n) [After n>0]. Cf. A081152.

Sequence in context: A058409 A125833 A129547 * A132848 A321032 A180036

Adjacent sequences:  A081148 A081149 A081150 * A081152 A081153 A081154

KEYWORD

nonn

AUTHOR

Wouter Meeussen & Antti Karttunen Mar 10 2003

STATUS

approved

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Last modified April 14 19:32 EDT 2021. Contains 342951 sequences. (Running on oeis4.)