A372347 - cp's OEIS frontend

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.

n	a(n)
0	1
1	1
2	2
3	4
4	12
5	52
6	334
7	2866
8	31902
9	439510
10	7372150
11	147351714
12	3460114654
13	94073798158
14	2926942982790
15	103161703653178
16	4084845678671086
17	180433041383154870
18	8836346732709839206
19	477142911818397135058
20	28265453383985064929934

[1, 1, 2, 4, 12, 52, 334, 2866, 31902, 439510, 7372150, 147351714, 3460114654, 94073798158, 2926942982790, 103161703653178, 4084845678671086, 180433041383154870, 8836346732709839206, 477142911818397135058, 28265453383985064929934]

cp's OEIS Frontend

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.

Table of values

List of values