Number of even cycles in range [A014137(2n-1)..A014138(2n-1)] of permutation A057505/A057506, with no fixed points of A057164.
A081158
Number of even cycles in range [A014137(2n-1)..A014138(2n-1)] of permutation A057505/A057506, with no fixed points of A057164.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =8a(4) =60a(5) =402a(6) =2474a(7) =14496a(8) =84282a(9) =492048
External references
- oeis: A081158