Number of reversible strings with n beads using exactly six different colors.

A056313

Number of reversible strings with n beads using exactly six different colors.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =360a(6) =7560a(7) =95760a(8) =952560a(9) =8217720a(10) =64615680a(11) =476515080a(12) =3355679880a(13) =22837101840a(14) =151449674040a(15) =984573656640

External references