A173431 - cp's OEIS frontend

A173431 Count of consecutive coprime iterations of sum-of-divisors function.

n	a(n)
1	1
2	6
3	5
4	4
5	2
6	1
7	3
8	2
9	3
10	1
11	2
12	1
13	2
14	1
15	1
16	5
17	2
18	1
19	2
20	1
21	4
22	1
23	2
24	1
25	5
26	1
27	2
28	1
29	2
30	1
31	4
32	3
33	1
34	1
35	2
36	2
37	2
38	1
39	2
40	1
41	2
42	1
43	2
44	1
45	1
46	1
47	2
48	1
49	3
50	4
51	1
52	1
53	2
54	1
55	2
56	1
57	2
58	1
59	2
60	1
61	2
62	1
63	2
64	4
65	2
66	1
67	2
68	1
69	1
70	1
71	2
72	1
73	2
74	1
75	2
76	1
77	2
78	1
79	2
80	1
81	4
82	1
83	2
84	1
85	2
86	1
87	1
88	1
89	2
90	1
91	1
92	1
93	3
94	1
95	1
96	1
97	4
98	3
99	1
100	5
101	2
102	1
103	2
104	1
105	1

[1, 6, 5, 4, 2, 1, 3, 2, 3, 1, 2, 1, 2, 1, 1, 5, 2, 1, 2, 1, 4, 1, 2, 1, 5, 1, 2, 1, 2, 1, 4, 3, 1, 1, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 3, 4, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 4, 2, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 4, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 1, 3, 1, 1, 1, 4, 3, 1, 5, 2, 1, 2, 1, 1]

cp's OEIS Frontend

A173431 Count of consecutive coprime iterations of sum-of-divisors function.

Table of values

List of values

n	a(n)
1	1
2	6
3	5
4	4
5	2
6	1
7	3
8	2
9	3
10	1
11	2
12	1
13	2
14	1
15	1
16	5
17	2
18	1
19	2
20	1
21	4
22	1
23	2
24	1
25	5
26	1
27	2
28	1
29	2
30	1
31	4
32	3
33	1
34	1
35	2
36	2
37	2
38	1
39	2
40	1
41	2
42	1
43	2
44	1
45	1
46	1
47	2
48	1
49	3
50	4
51	1
52	1
53	2
54	1
55	2
56	1
57	2
58	1
59	2
60	1
61	2
62	1
63	2
64	4
65	2
66	1
67	2
68	1
69	1
70	1
71	2
72	1
73	2
74	1
75	2
76	1
77	2
78	1
79	2
80	1
81	4
82	1
83	2
84	1
85	2
86	1
87	1
88	1
89	2
90	1
91	1
92	1
93	3
94	1
95	1
96	1
97	4
98	3
99	1
100	5
101	2
102	1
103	2
104	1
105	1

n	a(n)
1	1
2	6
3	5
4	4
5	2
6	1
7	3
8	2
9	3
10	1
11	2
12	1
13	2
14	1
15	1
16	5
17	2
18	1
19	2
20	1
21	4
22	1
23	2
24	1
25	5
26	1
27	2
28	1
29	2
30	1
31	4
32	3
33	1
34	1
35	2
36	2
37	2
38	1
39	2
40	1
41	2
42	1
43	2
44	1
45	1
46	1
47	2
48	1
49	3
50	4
51	1
52	1
53	2
54	1
55	2
56	1
57	2
58	1
59	2
60	1
61	2
62	1
63	2
64	4
65	2
66	1
67	2
68	1
69	1
70	1
71	2
72	1
73	2
74	1
75	2
76	1
77	2
78	1
79	2
80	1
81	4
82	1
83	2
84	1
85	2
86	1
87	1
88	1
89	2
90	1
91	1
92	1
93	3
94	1
95	1
96	1
97	4
98	3
99	1
100	5
101	2
102	1
103	2
104	1
105	1

n	a(n)
1	1
2	6
3	5
4	4
5	2
6	1
7	3
8	2
9	3
10	1
11	2
12	1
13	2
14	1
15	1
16	5
17	2
18	1
19	2
20	1
21	4
22	1
23	2
24	1
25	5
26	1
27	2
28	1
29	2
30	1
31	4
32	3
33	1
34	1
35	2
36	2
37	2
38	1
39	2
40	1
41	2
42	1
43	2
44	1
45	1
46	1
47	2
48	1
49	3
50	4
51	1
52	1
53	2
54	1
55	2
56	1
57	2
58	1
59	2
60	1
61	2
62	1
63	2
64	4
65	2
66	1
67	2
68	1
69	1
70	1
71	2
72	1
73	2
74	1
75	2
76	1
77	2
78	1
79	2
80	1
81	4
82	1
83	2
84	1
85	2
86	1
87	1
88	1
89	2
90	1
91	1
92	1
93	3
94	1
95	1
96	1
97	4
98	3
99	1
100	5
101	2
102	1
103	2
104	1
105	1