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A081152
Number of even cycles in range [
A014137
(2n)..
A014138
(2n)] of permutation
A057505
/
A057506
.
2
0, 1, 6, 37, 212, 1226, 6822, 38081, 215414
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..8.
FORMULA
a(n) =
A081150
(2n+1) =
A081159
(n)+
A081161
(n)+
A081163
(n).
CROSSREFS
Cf.
A081151
.
Cf.
A081150
,
A081159
,
A081161
,
A081163
.
Cf.
A014137
,
A014138
,
A057505
,
A057506
.
Sequence in context:
A156185
A057418
A001419
*
A244618
A033116
A033124
Adjacent sequences:
A081149
A081150
A081151
*
A081153
A081154
A081155
KEYWORD
nonn
,
more
AUTHOR
Wouter Meeussen
and
Antti Karttunen
, Mar 10 2003
STATUS
approved
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Last modified August 30 05:37 EDT 2024. Contains 375526 sequences. (Running on oeis4.)