A077198 - cp's OEIS frontend

A077198 a(n) = lambda(sigma(n)), where lambda(n) is the Carmichael lambda function, which gives the smallest integer m such that k^m = 1 mod n for all integers k relatively prime to n.

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	2
7	2
8	4
9	12
10	6
11	2
12	6
13	6
14	2
15	2
16	30
17	6
18	12
19	4
20	6
21	8
22	6
23	2
24	4
25	30
26	6
27	4
28	6
29	4
30	6
31	8
32	6
33	4
34	18
35	4
36	12
37	18
38	4
39	6
40	12
41	6
42	8
43	10
44	6
45	12
46	6
47	4
48	30
49	18
50	30
51	6
52	42
53	18
54	4
55	6
56	4
57	4
58	12
59	4
60	6
61	30
62	8
63	12
64	126
65	6
66	12
67	16
68	6
69	8
70	12
71	6
72	12
73	36
74	18
75	30
76	12
77	8
78	6
79	4
80	30
81	110
82	6
83	6
84	24
85	18
86	10
87	4

[1, 2, 2, 6, 2, 2, 2, 4, 12, 6, 2, 6, 6, 2, 2, 30, 6, 12, 4, 6, 8, 6, 2, 4, 30, 6, 4, 6, 4, 6, 8, 6, 4, 18, 4, 12, 18, 4, 6, 12, 6, 8, 10, 6, 12, 6, 4, 30, 18, 30, 6, 42, 18, 4, 6, 4, 4, 12, 4, 6, 30, 8, 12, 126, 6, 12, 16, 6, 8, 12, 6, 12, 36, 18, 30, 12, 8, 6, 4, 30, 110, 6, 6, 24, 18, 10, 4]

cp's OEIS Frontend

A077198 a(n) = lambda(sigma(n)), where lambda(n) is the Carmichael lambda function, which gives the smallest integer m such that k^m = 1 mod n for all integers k relatively prime to n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	2
7	2
8	4
9	12
10	6
11	2
12	6
13	6
14	2
15	2
16	30
17	6
18	12
19	4
20	6
21	8
22	6
23	2
24	4
25	30
26	6
27	4
28	6
29	4
30	6
31	8
32	6
33	4
34	18
35	4
36	12
37	18
38	4
39	6
40	12
41	6
42	8
43	10
44	6
45	12
46	6
47	4
48	30
49	18
50	30
51	6
52	42
53	18
54	4
55	6
56	4
57	4
58	12
59	4
60	6
61	30
62	8
63	12
64	126
65	6
66	12
67	16
68	6
69	8
70	12
71	6
72	12
73	36
74	18
75	30
76	12
77	8
78	6
79	4
80	30
81	110
82	6
83	6
84	24
85	18
86	10
87	4

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	2
7	2
8	4
9	12
10	6
11	2
12	6
13	6
14	2
15	2
16	30
17	6
18	12
19	4
20	6
21	8
22	6
23	2
24	4
25	30
26	6
27	4
28	6
29	4
30	6
31	8
32	6
33	4
34	18
35	4
36	12
37	18
38	4
39	6
40	12
41	6
42	8
43	10
44	6
45	12
46	6
47	4
48	30
49	18
50	30
51	6
52	42
53	18
54	4
55	6
56	4
57	4
58	12
59	4
60	6
61	30
62	8
63	12
64	126
65	6
66	12
67	16
68	6
69	8
70	12
71	6
72	12
73	36
74	18
75	30
76	12
77	8
78	6
79	4
80	30
81	110
82	6
83	6
84	24
85	18
86	10
87	4

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	2
7	2
8	4
9	12
10	6
11	2
12	6
13	6
14	2
15	2
16	30
17	6
18	12
19	4
20	6
21	8
22	6
23	2
24	4
25	30
26	6
27	4
28	6
29	4
30	6
31	8
32	6
33	4
34	18
35	4
36	12
37	18
38	4
39	6
40	12
41	6
42	8
43	10
44	6
45	12
46	6
47	4
48	30
49	18
50	30
51	6
52	42
53	18
54	4
55	6
56	4
57	4
58	12
59	4
60	6
61	30
62	8
63	12
64	126
65	6
66	12
67	16
68	6
69	8
70	12
71	6
72	12
73	36
74	18
75	30
76	12
77	8
78	6
79	4
80	30
81	110
82	6
83	6
84	24
85	18
86	10
87	4