A329878 - cp's OEIS frontend

A329878 Numbers k such that k and psi(k) have the same set of prime divisors, where psi is the Dedekind psi function (A001615).

n	a(n)
1	1
2	6
3	12
4	18
5	24
6	36
7	48
8	54
9	72
10	96
11	108
12	144
13	150
14	162
15	192
16	216
17	288
18	294
19	300
20	324
21	384
22	432
23	450
24	486
25	576
26	588
27	600
28	648
29	726
30	750
31	768
32	864
33	882
34	900
35	972
36	1152
37	1176
38	1200
39	1296
40	1350
41	1452
42	1458
43	1500
44	1536
45	1728
46	1734
47	1764
48	1800
49	1944
50	2058
51	2178

[1, 6, 12, 18, 24, 36, 48, 54, 72, 96, 108, 144, 150, 162, 192, 216, 288, 294, 300, 324, 384, 432, 450, 486, 576, 588, 600, 648, 726, 750, 768, 864, 882, 900, 972, 1152, 1176, 1200, 1296, 1350, 1452, 1458, 1500, 1536, 1728, 1734, 1764, 1800, 1944, 2058, 2178]

cp's OEIS Frontend

A329878 Numbers k such that k and psi(k) have the same set of prime divisors, where psi is the Dedekind psi function (A001615).

Table of values

List of values