A353764 - cp's OEIS frontend

A353764 Numbers k for which A353749(sigma(k)) is a multiple of A353749(k), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes.

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	10
7	18
8	20
9	24
10	28
11	30
12	32
13	40
14	60
15	72
16	84
17	90
18	108
19	120
20	128
21	200
22	216
23	224
24	234
25	252
26	360
27	384
28	496
29	600
30	640
31	672
32	864
33	936
34	1080
35	1120
36	1152
37	1170
38	1488
39	1800
40	1920
41	2016
42	2176
43	3200
44	3360
45	3456
46	4320
47	4464
48	4680
49	5148
50	5600
51	5760
52	6048
53	6528
54	6552
55	8128
56	9600
57	10080
58	10880
59	14976
60	16800
61	17280

[1, 2, 4, 6, 8, 10, 18, 20, 24, 28, 30, 32, 40, 60, 72, 84, 90, 108, 120, 128, 200, 216, 224, 234, 252, 360, 384, 496, 600, 640, 672, 864, 936, 1080, 1120, 1152, 1170, 1488, 1800, 1920, 2016, 2176, 3200, 3360, 3456, 4320, 4464, 4680, 5148, 5600, 5760, 6048, 6528, 6552, 8128, 9600, 10080, 10880, 14976, 16800, 17280]

cp's OEIS Frontend

A353764 Numbers k for which A353749(sigma(k)) is a multiple of A353749(k), where A353749(k) = phi(k) * A064989(k), and A064989 shifts the prime factorization one step towards lower primes.

Table of values

List of values