Number of closed paths of length n whose steps are 12th roots of unity, U_12(n).
A198808
Number of closed paths of length n whose steps are 12th roots of unity, U_12(n).
Terms
- a(0) =1a(1) =0a(2) =12a(3) =24a(4) =396a(5) =2160a(6) =23160a(7) =186480a(8) =1845900a(9) =17213280a(10) =171575712a(11) =1703560320a(12) =17365421304a(13) =178323713568
External references
- oeis: A198808