a(n) = Sum_{i=0..n} Stirling2(n,i)*2^(4i).
A221176
a(n) = Sum_{i=0..n} Stirling2(n,i)*2^(4i).
Terms
- a(0) =1a(1) =16a(2) =272a(3) =4880a(4) =91920a(5) =1810192a(6) =37142288a(7) =791744272a(8) =17490370320a(9) =399558315792
External references
- oeis: A221176