%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