A321944 - cp's OEIS frontend

A321944 Starting from n, repeatedly compute the sum of the prime divisors until a fixed point or 0 is reached; a(n) is the number of terms, including n.

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

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

cp's OEIS Frontend

A321944 Starting from n, repeatedly compute the sum of the prime divisors until a fixed point or 0 is reached; a(n) is the number of terms, including n.

Table of values

List of values

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

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

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