a(n) = Sum_{k=0..floor(n/3)} n^k * Stirling2(n,3*k).
A356363
a(n) = Sum_{k=0..floor(n/3)} n^k * Stirling2(n,3*k).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =3a(4) =24a(5) =125a(6) =576a(7) =3136a(8) =24752a(9) =242280a(10) =2421000a(11) =23568743a(12) =230156136a(13) =2370756505a(14) =26664718080a(15) =326641069815
External references
- oeis: A356363