a(n) is the number of all five-color bracelets (necklaces with turning over allowed) with n beads and the four colors are from a repertoire of n distinct colors, for n >= 5.

A214313

a(n) is the number of all five-color bracelets (necklaces with turning over allowed) with n beads and the four colors are from a repertoire of n distinct colors, for n >= 5.

Terms

    a(0) =12a(1) =900a(2) =25200a(3) =442680a(4) =5846400a(5) =64420272a(6) =622175400a(7) =5466166200a(8) =44611306740a(9) =343916472900

External references