A362489 - cp's OEIS frontend

A362489 a(n) is the least number k such that the equation iphi(x) = k has exactly 2*n solutions, or -1 if no such k exists, where iphi is the infinitary totient function A091732.

n	a(n)
0	5
1	1
2	6
3	12
4	36
5	24
6	396
7	48
8	216
9	96
10	528
11	144
12	384
13	2784
14	432
15	240
16	1296
17	288
18	1584
19	1800
20	480
21	1680
22	1080
23	864
24	576
25	3240
26	2016
27	960
28	6624
29	720
30	1152
31	7776
32	12000
33	8448
34	5280
35	1728
36	10752
37	2304
38	4032
39	4800
40	6048
41	3840
42	2160
43	5184
44	4608
45	6336
46	1440
47	10560
48	29568

[5, 1, 6, 12, 36, 24, 396, 48, 216, 96, 528, 144, 384, 2784, 432, 240, 1296, 288, 1584, 1800, 480, 1680, 1080, 864, 576, 3240, 2016, 960, 6624, 720, 1152, 7776, 12000, 8448, 5280, 1728, 10752, 2304, 4032, 4800, 6048, 3840, 2160, 5184, 4608, 6336, 1440, 10560, 29568]

cp's OEIS Frontend

A362489 a(n) is the least number k such that the equation iphi(x) = k has exactly 2*n solutions, or -1 if no such k exists, where iphi is the infinitary totient function A091732.

Table of values

List of values