A067710 - cp's OEIS frontend

A067710 a(n) = n! * Sum_{k|n} (Sum_{j=1..k} 1/j); the k-sum is over the positive divisors, k, of n.

n	a(n)
1	1
2	5
3	17
4	110
5	394
6	4884
7	18108
8	294384
9	2054736
10	27986400
11	160460640
12	5733590400
13	26029779840
14	727452230400
15	11030096851200
16	223495556659200
17	1579093018675200
18	83918534992588800
19	553210247226470400
20	32584767906539520000
21	463473994611898368000
22	10352822932220719104000

[1, 5, 17, 110, 394, 4884, 18108, 294384, 2054736, 27986400, 160460640, 5733590400, 26029779840, 727452230400, 11030096851200, 223495556659200, 1579093018675200, 83918534992588800, 553210247226470400, 32584767906539520000, 463473994611898368000, 10352822932220719104000]

cp's OEIS Frontend

A067710 a(n) = n! * Sum_{k|n} (Sum_{j=1..k} 1/j); the k-sum is over the positive divisors, k, of n.

Table of values

List of values