a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * Stirling2(n,k).
A390888
a(n) = Sum_{k=0..n} 2^k * 3^(n-k) * Stirling2(n,k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =62a(4) =466a(5) =4094a(6) =40834a(7) =453422a(8) =5528530a(9) =73245086a(10) =1045617442a(11) =15974829710a(12) =259729905394
External references
- oeis: A390888