A353749 - cp's OEIS frontend

A353749 a(n) = phi(n) * A064989(n), where phi is Euler totient function, and A064989 shifts the prime factorization one step towards lower primes.

n	a(n)
1	1
2	1
3	4
4	2
5	12
6	4
7	30
8	4
9	24
10	12
11	70
12	8
13	132
14	30
15	48
16	8
17	208
18	24
19	306
20	24
21	120
22	70
23	418
24	16
25	180
26	132
27	144
28	60
29	644
30	48
31	870
32	16
33	280
34	208
35	360
36	48
37	1116
38	306
39	528
40	48
41	1480
42	120
43	1722
44	140
45	288
46	418
47	1978
48	32
49	1050
50	180
51	832
52	264
53	2444
54	144
55	840
56	120
57	1224
58	644
59	3074
60	96
61	3540
62	870
63	720
64	32
65	1584
66	280
67	4026
68	416

[1, 1, 4, 2, 12, 4, 30, 4, 24, 12, 70, 8, 132, 30, 48, 8, 208, 24, 306, 24, 120, 70, 418, 16, 180, 132, 144, 60, 644, 48, 870, 16, 280, 208, 360, 48, 1116, 306, 528, 48, 1480, 120, 1722, 140, 288, 418, 1978, 32, 1050, 180, 832, 264, 2444, 144, 840, 120, 1224, 644, 3074, 96, 3540, 870, 720, 32, 1584, 280, 4026, 416]

cp's OEIS Frontend

A353749 a(n) = phi(n) * A064989(n), where phi is Euler totient function, and A064989 shifts the prime factorization one step towards lower primes.

Table of values

List of values