A318249 - cp's OEIS frontend

A318249 a(n) = (n - 1)! * d(n), where d(n) = number of divisors of n (A000005).

n	a(n)
1	1
2	2
3	4
4	18
5	48
6	480
7	1440
8	20160
9	120960
10	1451520
11	7257600
12	239500800
13	958003200
14	24908083200
15	348713164800
16	6538371840000
17	41845579776000
18	2134124568576000
19	12804747411456000
20	729870602452992000
21	9731608032706560000
22	204363768686837760000
23	2248001455555215360000
24	206816133911079813120000

[1, 2, 4, 18, 48, 480, 1440, 20160, 120960, 1451520, 7257600, 239500800, 958003200, 24908083200, 348713164800, 6538371840000, 41845579776000, 2134124568576000, 12804747411456000, 729870602452992000, 9731608032706560000, 204363768686837760000, 2248001455555215360000, 206816133911079813120000]

cp's OEIS Frontend

A318249 a(n) = (n - 1)! * d(n), where d(n) = number of divisors of n (A000005).

Table of values

List of values