A058974 - cp's OEIS frontend

A058974 a(n) = 0 if n = 1 or a prime, otherwise a(n) = s + a(s) iterated until no change occurs, where s (A008472) is sum of distinct primes dividing n.

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	2
9	3
10	7
11	0
12	5
13	0
14	12
15	10
16	2
17	0
18	5
19	0
20	7
21	17
22	13
23	0
24	5
25	5
26	25
27	3
28	12
29	0
30	17
31	0
32	2
33	26
34	19
35	17
36	5
37	0
38	38
39	18
40	7
41	0
42	17
43	0
44	13
45	10
46	30
47	0
48	5
49	7
50	7
51	27
52	25
53	0
54	5
55	18
56	12
57	35
58	31
59	0
60	17
61	0
62	59
63	17
64	2
65	23
66	18
67	0
68	19
69	51
70	26
71	0
72	5
73	0
74	57
75	10
76	38
77	23
78	23
79	0
80	7
81	3
82	43
83	0
84	17
85	35
86	55
87	34
88	13
89	0

[0, 0, 0, 2, 0, 5, 0, 2, 3, 7, 0, 5, 0, 12, 10, 2, 0, 5, 0, 7, 17, 13, 0, 5, 5, 25, 3, 12, 0, 17, 0, 2, 26, 19, 17, 5, 0, 38, 18, 7, 0, 17, 0, 13, 10, 30, 0, 5, 7, 7, 27, 25, 0, 5, 18, 12, 35, 31, 0, 17, 0, 59, 17, 2, 23, 18, 0, 19, 51, 26, 0, 5, 0, 57, 10, 38, 23, 23, 0, 7, 3, 43, 0, 17, 35, 55, 34, 13, 0]

cp's OEIS Frontend

A058974 a(n) = 0 if n = 1 or a prime, otherwise a(n) = s + a(s) iterated until no change occurs, where s (A008472) is sum of distinct primes dividing n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	2
9	3
10	7
11	0
12	5
13	0
14	12
15	10
16	2
17	0
18	5
19	0
20	7
21	17
22	13
23	0
24	5
25	5
26	25
27	3
28	12
29	0
30	17
31	0
32	2
33	26
34	19
35	17
36	5
37	0
38	38
39	18
40	7
41	0
42	17
43	0
44	13
45	10
46	30
47	0
48	5
49	7
50	7
51	27
52	25
53	0
54	5
55	18
56	12
57	35
58	31
59	0
60	17
61	0
62	59
63	17
64	2
65	23
66	18
67	0
68	19
69	51
70	26
71	0
72	5
73	0
74	57
75	10
76	38
77	23
78	23
79	0
80	7
81	3
82	43
83	0
84	17
85	35
86	55
87	34
88	13
89	0

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	2
9	3
10	7
11	0
12	5
13	0
14	12
15	10
16	2
17	0
18	5
19	0
20	7
21	17
22	13
23	0
24	5
25	5
26	25
27	3
28	12
29	0
30	17
31	0
32	2
33	26
34	19
35	17
36	5
37	0
38	38
39	18
40	7
41	0
42	17
43	0
44	13
45	10
46	30
47	0
48	5
49	7
50	7
51	27
52	25
53	0
54	5
55	18
56	12
57	35
58	31
59	0
60	17
61	0
62	59
63	17
64	2
65	23
66	18
67	0
68	19
69	51
70	26
71	0
72	5
73	0
74	57
75	10
76	38
77	23
78	23
79	0
80	7
81	3
82	43
83	0
84	17
85	35
86	55
87	34
88	13
89	0

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	5
7	0
8	2
9	3
10	7
11	0
12	5
13	0
14	12
15	10
16	2
17	0
18	5
19	0
20	7
21	17
22	13
23	0
24	5
25	5
26	25
27	3
28	12
29	0
30	17
31	0
32	2
33	26
34	19
35	17
36	5
37	0
38	38
39	18
40	7
41	0
42	17
43	0
44	13
45	10
46	30
47	0
48	5
49	7
50	7
51	27
52	25
53	0
54	5
55	18
56	12
57	35
58	31
59	0
60	17
61	0
62	59
63	17
64	2
65	23
66	18
67	0
68	19
69	51
70	26
71	0
72	5
73	0
74	57
75	10
76	38
77	23
78	23
79	0
80	7
81	3
82	43
83	0
84	17
85	35
86	55
87	34
88	13
89	0