a(1)=1, a(n) = n * (Sum_{k=1..n-1} a(k)) - 2.
A082427
a(1)=1, a(n) = n * (Sum_{k=1..n-1} a(k)) - 2.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =6a(4) =38a(5) =274a(6) =2238a(7) =20462a(8) =207178a(9) =2301978a(10) =27853934a(11) =364633318a(12) =5135252562a(13) =77423807858
External references
- oeis: A082427