A326889 - cp's OEIS frontend

A326889 a(1) = 1; thereafter a(n) = a(n-1) / phi(n) if phi(n) divides a(n-1), otherwise a(n) = a(n-1) * phi(n), where phi is the Euler phi-function A000010.

n	a(n)
1	1
2	1
3	2
4	1
5	4
6	2
7	12
8	3
9	18
10	72
11	720
12	180
13	15
14	90
15	720
16	90
17	1440
18	240
19	4320
20	540
21	45
22	450
23	9900
24	79200
25	3960
26	330
27	5940
28	495
29	13860
30	110880
31	3696
32	231
33	4620
34	73920
35	3080
36	36960
37	1330560
38	73920
39	3080
40	49280
41	1232
42	14784
43	352
44	7040
45	168960
46	7680
47	353280
48	22080

[1, 1, 2, 1, 4, 2, 12, 3, 18, 72, 720, 180, 15, 90, 720, 90, 1440, 240, 4320, 540, 45, 450, 9900, 79200, 3960, 330, 5940, 495, 13860, 110880, 3696, 231, 4620, 73920, 3080, 36960, 1330560, 73920, 3080, 49280, 1232, 14784, 352, 7040, 168960, 7680, 353280, 22080]

cp's OEIS Frontend

A326889 a(1) = 1; thereafter a(n) = a(n-1) / phi(n) if phi(n) divides a(n-1), otherwise a(n) = a(n-1) * phi(n), where phi is the Euler phi-function A000010.

Table of values

List of values