A280988 - cp's OEIS frontend

A280988 Least k such that phi(k*n) is a perfect square, or 0 if no such k exists.

n	a(n)
1	1
2	1
3	4
4	2
5	1
6	2
7	9
8	1
9	7
10	1
11	41
12	1
13	21
14	9
15	4
16	2
17	1
18	6
19	3
20	2
21	3
22	41
23	89
24	2
25	5
26	14
27	4
28	13
29	113
30	2
31	143
32	1
33	25
34	1
35	9
36	3
37	1
38	2
39	7
40	1
41	11
42	3
43	49
44	25
45	7
46	89
47	1151
48	1
49	43
50	5
51	4
52	7
53	553
54	2
55	15
56	9
57	1
58	113
59	233
60	1
61	77
62	122
63	1
64	2
65	21
66	25
67	299
68	2
69	356
70	9
71	281
72	6
73	3
74	1
75	11
76	1
77	61
78	6
79	313

[1, 1, 4, 2, 1, 2, 9, 1, 7, 1, 41, 1, 21, 9, 4, 2, 1, 6, 3, 2, 3, 41, 89, 2, 5, 14, 4, 13, 113, 2, 143, 1, 25, 1, 9, 3, 1, 2, 7, 1, 11, 3, 49, 25, 7, 89, 1151, 1, 43, 5, 4, 7, 553, 2, 15, 9, 1, 113, 233, 1, 77, 122, 1, 2, 21, 25, 299, 2, 356, 9, 281, 6, 3, 1, 11, 1, 61, 6, 313]

cp's OEIS Frontend

A280988 Least k such that phi(k*n) is a perfect square, or 0 if no such k exists.

Table of values

List of values