a(n) = Sum_{k>=0} (1/2)^(k+1) * Stirling2(n+k,k).
A390890
a(n) = Sum_{k>=0} (1/2)^(k+1) * Stirling2(n+k,k).
Terms
- a(0) =1a(1) =2a(2) =16a(3) =208a(4) =3776a(5) =88064a(6) =2509312a(7) =84484096a(8) =3281641472a(9) =144454565888
External references
- oeis: A390890