a(n) = Sum_{k=0..n} k^binomial(n,k).A356719a(n) = Sum_{k=0..n} k^binomial(n,k).Terms a(0) =0a(1) =1a(2) =3a(3) =12a(4) =150a(5) =61103a(6) =4560574625External referencesoeis: A356719