Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with no fixed points of either A057163 or A057164.
A081159
Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with no fixed points of either A057163 or A057164.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =20a(4) =148a(5) =986a(6) =5918a(7) =34708a(8) =202664
External references
- oeis: A081159