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A081161
Number of even cycles in range [
A014137
(2n)..
A014138
(2n)] of permutation
A057505
/
A057506
, with two fixed-points of
A057164
.
2
0, 1, 4, 16, 60, 225, 848, 3188, 12095
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..8.
FORMULA
a(n) =
A081160
(2n+1).
CROSSREFS
Cf.
A081160
,
A014137
,
A014138
,
A057505
,
A057506
,
A057164
.
Sequence in context:
A231896
A128650
A072335
*
A032106
A269462
A047097
Adjacent sequences:
A081158
A081159
A081160
*
A081162
A081163
A081164
KEYWORD
nonn
,
more
AUTHOR
Wouter Meeussen
and
Antti Karttunen
, Mar 10 2003
STATUS
approved
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Last modified June 30 02:52 EDT 2024. Contains 373859 sequences. (Running on oeis4.)