a(1) = 1; a(n) = Sum_{k=1..n-1, gcd(n,k) = 1} Stirling2(n,k)*a(k).
A308476
a(1) = 1; a(n) = Sum_{k=1..n-1, gcd(n,k) = 1} Stirling2(n,k)*a(k).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =366a(5) =5491a(6) =176569a(7) =5332097a(8) =276268942a(9) =13470365431
External references
- oeis: A308476