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A081163 Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with two fixed-points of A057163. 3
0, 0, 0, 1, 4, 15, 56, 185, 655 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
Table of n, a(n) for n=0..8.
FORMULA
a(n) = A081162(2n+1) = (A000108(n) - A081156(n))/2.
CROSSREFS
Cf. A081162, A000108, A081156.
Cf. A014137, A014138, A057505, A057506, A057163.
Sequence in context: A064813 A183932 A009940 * A082133 A060111 A077824
Adjacent sequences: A081160 A081161 A081162 * A081164 A081165 A081166
KEYWORD
nonn,more
AUTHOR
Wouter Meeussen and Antti Karttunen, Mar 10 2003
STATUS
approved

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Last modified May 29 05:33 EDT 2024. Contains 372921 sequences. (Running on oeis4.)