Number of closed paths of length n whose steps are 20th roots of unity, U_20(n).
A198800
Number of closed paths of length n whose steps are 20th roots of unity, U_20(n).
Terms
- a(0) =1a(1) =0a(2) =20a(3) =0a(4) =1140a(5) =480a(6) =102800a(7) =151200a(8) =12310900a(9) =38707200a(10) =1812247920a(11) =9574488000a(12) =313983978000
External references
- oeis: A198800