A353679 - cp's OEIS frontend

A353679 Odd numbers k for which phi(k) = phi(sigma(k)).

n	a(n)
1	1
2	3
3	15
4	39
5	45
6	111
7	117
8	175
9	183
10	195
11	219
12	333
13	357
14	471
15	549
16	555
17	579
18	585
19	657
20	831
21	915
22	939
23	1071
24	1095
25	1191
26	1263
27	1371
28	1413
29	1443
30	1623
31	1665
32	1737
33	1839
34	1983
35	2019
36	2199
37	2271
38	2275
39	2295
40	2355
41	2379
42	2493
43	2631
44	2745
45	2817
46	2847
47	2895
48	2991
49	3279
50	3285
51	3459
52	3573
53	3603
54	3639
55	3711
56	3789
57	3963

[1, 3, 15, 39, 45, 111, 117, 175, 183, 195, 219, 333, 357, 471, 549, 555, 579, 585, 657, 831, 915, 939, 1071, 1095, 1191, 1263, 1371, 1413, 1443, 1623, 1665, 1737, 1839, 1983, 2019, 2199, 2271, 2275, 2295, 2355, 2379, 2493, 2631, 2745, 2817, 2847, 2895, 2991, 3279, 3285, 3459, 3573, 3603, 3639, 3711, 3789, 3963]

cp's OEIS Frontend

A353679 Odd numbers k for which phi(k) = phi(sigma(k)).

Table of values

List of values