a(n) = Sum_{k=0..floor(n/3)} n^k * |Stirling1(n,3*k)|.
A356361
a(n) = Sum_{k=0..floor(n/3)} n^k * |Stirling1(n,3*k)|.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =3a(4) =24a(5) =175a(6) =1386a(7) =12397a(8) =125664a(9) =1431261a(10) =18099300a(11) =251194911a(12) =3788383248a(13) =61584927495
External references
- oeis: A356361