Number of bracelets consisting of three instances each of n swappable colors.

A362657

Number of bracelets consisting of three instances each of n swappable colors.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =25a(4) =713a(5) =47283a(6) =5301453a(7) =862284559a(8) =190869905951

External references