%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