a(n) = (n^(n-1)-1)/(n-1)^2.
A060073
a(n) = (n^(n-1)-1)/(n-1)^2.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =39a(4) =311a(5) =3268a(6) =42799a(7) =672605a(8) =12345679a(9) =259374246a(10) =6140565047a(11) =161792257795
External references
- oeis: A060073
A060073
a(n) = (n^(n-1)-1)/(n-1)^2.