A324747 - cp's OEIS frontend

A324747 Numbers k with exactly two distinct prime factors and such that phi(k) is a square, when: k = p^(2s) * q^(2t+1) with s >= 1, t >= 0, p <> q primes.

n	a(n)
1	12
2	48
3	63
4	76
5	108
6	192
7	292
8	304
9	432
10	567
11	652
12	768
13	873
14	972
15	1168
16	1216
17	1359
18	1728
19	2107
20	2608
21	3072
22	3087
23	3532
24	3888
25	4383
26	4525
27	4612
28	4672
29	4864
30	5103
31	5409
32	5836
33	6543
34	6912
35	7204
36	7857
37	8716
38	8748
39	10372
40	10432
41	12231
42	12288

[12, 48, 63, 76, 108, 192, 292, 304, 432, 567, 652, 768, 873, 972, 1168, 1216, 1359, 1728, 2107, 2608, 3072, 3087, 3532, 3888, 4383, 4525, 4612, 4672, 4864, 5103, 5409, 5836, 6543, 6912, 7204, 7857, 8716, 8748, 10372, 10432, 12231, 12288]

cp's OEIS Frontend

A324747 Numbers k with exactly two distinct prime factors and such that phi(k) is a square, when: k = p^(2s) * q^(2t+1) with s >= 1, t >= 0, p <> q primes.

Table of values

List of values