a(n) = (2n-1) * 3^(2n-1).
A060851
a(n) = (2n-1) * 3^(2n-1).
Terms
- a(0) =3a(1) =81a(2) =1215a(3) =15309a(4) =177147a(5) =1948617a(6) =20726199a(7) =215233605a(8) =2195382771a(9) =22082967873a(10) =219667417263
External references
- oeis: A060851
A060851
a(n) = (2n-1) * 3^(2n-1).