%I #6 Jan 11 2024 09:03:43
%S 0,1,6,37,212,1226,6822,38081,215414
%N Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506.
%F a(n) = A081150(2n+1) = A081159(n)+A081161(n)+A081163(n).
%Y Cf. A081151.
%Y Cf. A081150, A081159, A081161, A081163.
%Y Cf. A014137, A014138, A057505, A057506.
%K nonn,more
%O 0,3
%A _Wouter Meeussen_ and _Antti Karttunen_, Mar 10 2003