a(n) = Sum_{j=0..n} p(n - j, j) where p(n, x) = Sum_{k=0..n} k! * Stirling1(n, k) * x^k.
A372347
a(n) = Sum_{j=0..n} p(n - j, j) where p(n, x) = Sum_{k=0..n} k! * Stirling1(n, k) * x^k.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =52a(6) =334a(7) =2866a(8) =31902a(9) =439510a(10) =7372150a(11) =147351714a(12) =3460114654a(13) =94073798158
External references
- oeis: A372347