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Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with two fixed-points of A057164.
2

%I #7 Jan 11 2024 09:09:10

%S 0,1,4,16,60,225,848,3188,12095

%N Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with two fixed-points of A057164.

%F a(n) = A081160(2n+1).

%Y Cf. A081160, A014137, A014138, A057505, A057506, A057164.

%K nonn,more

%O 0,3

%A _Wouter Meeussen_ and _Antti Karttunen_, Mar 10 2003