A354685 - cp's OEIS frontend

A354685 a(n) = n! * Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * H(k), where H(k) is the k-th harmonic number.

n	a(n)
0	0
1	1
2	5
3	50
4	854
5	22354
6	833244
7	41974176
8	2748169584
9	226916044848
10	23069499189120
11	2831994888419520
12	413051278946186880
13	70608112721914654080
14	13982696139441640584960
15	3175762393024883382067200
16	820007850688478572529203200
17	238863690100874514528150681600

[0, 1, 5, 50, 854, 22354, 833244, 41974176, 2748169584, 226916044848, 23069499189120, 2831994888419520, 413051278946186880, 70608112721914654080, 13982696139441640584960, 3175762393024883382067200, 820007850688478572529203200, 238863690100874514528150681600]

cp's OEIS Frontend

A354685 a(n) = n! * Sum_{k=1..n} (-1)^(n-k) * Stirling1(n,k) * H(k), where H(k) is the k-th harmonic number.

Table of values

List of values