a(n) = Sum_{k=0..floor(n/3)} 2^k * |Stirling1(n,3*k)|.
A357831
a(n) = Sum_{k=0..floor(n/3)} 2^k * |Stirling1(n,3*k)|.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =2a(4) =12a(5) =70a(6) =454a(7) =3332a(8) =27552a(9) =254400a(10) =2598852a(11) =29125932a(12) =355455468a(13) =4693396656a(14) =66671326176
External references
- oeis: A357831