A289276 - cp's OEIS frontend

A289276 Numbers k such that phi(k) (the totient function A000010) is a power of the number of divisors of k (A000005).

n	a(n)
1	1
2	2
3	3
4	5
5	8
6	10
7	17
8	18
9	24
10	30
11	34
12	63
13	76
14	85
15	128
16	136
17	170
18	257
19	315
20	333
21	364
22	380
23	436
24	444
25	514
26	640
27	680
28	972
29	1285
30	1542
31	1820
32	1824
33	1836
34	1875
35	2142
36	2220
37	2907
38	3285
39	3488
40	3796
41	4369
42	4788
43	4860

[1, 2, 3, 5, 8, 10, 17, 18, 24, 30, 34, 63, 76, 85, 128, 136, 170, 257, 315, 333, 364, 380, 436, 444, 514, 640, 680, 972, 1285, 1542, 1820, 1824, 1836, 1875, 2142, 2220, 2907, 3285, 3488, 3796, 4369, 4788, 4860]

cp's OEIS Frontend

A289276 Numbers k such that phi(k) (the totient function A000010) is a power of the number of divisors of k (A000005).

Table of values

List of values