A029908 - cp's OEIS frontend

A029908 Starting with n, repeatedly sum prime factors (with multiplicity) until reaching 0 or a fixed point. Then a(n) is the fixed point (or 0).

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	5
7	7
8	5
9	5
10	7
11	11
12	7
13	13
14	5
15	5
16	5
17	17
18	5
19	19
20	5
21	7
22	13
23	23
24	5
25	7
26	5
27	5
28	11
29	29
30	7
31	31
32	7
33	5
34	19
35	7
36	7
37	37
38	7
39	5
40	11
41	41
42	7
43	43
44	5
45	11
46	7
47	47
48	11
49	5
50	7
51	5
52	17
53	53
54	11
55	5
56	13
57	13
58	31
59	59
60	7
61	61
62	5
63	13
64	7
65	5
66	5
67	67
68	7
69	5
70	5
71	71
72	7
73	73
74	5
75	13
76	23
77	5
78	5
79	79
80	13
81	7
82	43
83	83
84	5
85	13

[0, 2, 3, 4, 5, 5, 7, 5, 5, 7, 11, 7, 13, 5, 5, 5, 17, 5, 19, 5, 7, 13, 23, 5, 7, 5, 5, 11, 29, 7, 31, 7, 5, 19, 7, 7, 37, 7, 5, 11, 41, 7, 43, 5, 11, 7, 47, 11, 5, 7, 5, 17, 53, 11, 5, 13, 13, 31, 59, 7, 61, 5, 13, 7, 5, 5, 67, 7, 5, 5, 71, 7, 73, 5, 13, 23, 5, 5, 79, 13, 7, 43, 83, 5, 13]

cp's OEIS Frontend

A029908 Starting with n, repeatedly sum prime factors (with multiplicity) until reaching 0 or a fixed point. Then a(n) is the fixed point (or 0).

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	5
7	7
8	5
9	5
10	7
11	11
12	7
13	13
14	5
15	5
16	5
17	17
18	5
19	19
20	5
21	7
22	13
23	23
24	5
25	7
26	5
27	5
28	11
29	29
30	7
31	31
32	7
33	5
34	19
35	7
36	7
37	37
38	7
39	5
40	11
41	41
42	7
43	43
44	5
45	11
46	7
47	47
48	11
49	5
50	7
51	5
52	17
53	53
54	11
55	5
56	13
57	13
58	31
59	59
60	7
61	61
62	5
63	13
64	7
65	5
66	5
67	67
68	7
69	5
70	5
71	71
72	7
73	73
74	5
75	13
76	23
77	5
78	5
79	79
80	13
81	7
82	43
83	83
84	5
85	13

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	5
7	7
8	5
9	5
10	7
11	11
12	7
13	13
14	5
15	5
16	5
17	17
18	5
19	19
20	5
21	7
22	13
23	23
24	5
25	7
26	5
27	5
28	11
29	29
30	7
31	31
32	7
33	5
34	19
35	7
36	7
37	37
38	7
39	5
40	11
41	41
42	7
43	43
44	5
45	11
46	7
47	47
48	11
49	5
50	7
51	5
52	17
53	53
54	11
55	5
56	13
57	13
58	31
59	59
60	7
61	61
62	5
63	13
64	7
65	5
66	5
67	67
68	7
69	5
70	5
71	71
72	7
73	73
74	5
75	13
76	23
77	5
78	5
79	79
80	13
81	7
82	43
83	83
84	5
85	13

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	5
7	7
8	5
9	5
10	7
11	11
12	7
13	13
14	5
15	5
16	5
17	17
18	5
19	19
20	5
21	7
22	13
23	23
24	5
25	7
26	5
27	5
28	11
29	29
30	7
31	31
32	7
33	5
34	19
35	7
36	7
37	37
38	7
39	5
40	11
41	41
42	7
43	43
44	5
45	11
46	7
47	47
48	11
49	5
50	7
51	5
52	17
53	53
54	11
55	5
56	13
57	13
58	31
59	59
60	7
61	61
62	5
63	13
64	7
65	5
66	5
67	67
68	7
69	5
70	5
71	71
72	7
73	73
74	5
75	13
76	23
77	5
78	5
79	79
80	13
81	7
82	43
83	83
84	5
85	13