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A081157 Number of even cycles in range [A014137(n-1)..A014138(n-1)] of permutation A057505/A057506, with no fixed points of either A057163 or A057164. 5
0, 0, 0, 0, 0, 2, 8, 20, 60, 148, 402, 986, 2474, 5918, 14496, 34708, 84282, 202664, 492048 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Bisections: A081158, A081159. Cf. A081150, A081160, A081162.

Sequence in context: A238760 A174477 A024997 * A099177 A100097 A133467

Adjacent sequences:  A081154 A081155 A081156 * A081158 A081159 A081160

KEYWORD

nonn

AUTHOR

Wouter Meeussen & Antti Karttunen Mar 10 2003

STATUS

approved

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Last modified January 26 14:08 EST 2020. Contains 331280 sequences. (Running on oeis4.)