Number of closed paths of length n whose steps are 15th roots of unity, U_15(n).

A198805

Number of closed paths of length n whose steps are 15th roots of unity, U_15(n).

Terms

    a(0) =1a(1) =0a(2) =0a(3) =30a(4) =0a(5) =360a(6) =7650a(7) =0a(8) =302400a(9) =4544400a(10) =11226600a(11) =324324000a(12) =4310633250a(13) =24324300000a(14) =437404968000

External references