A105221 - cp's OEIS frontend

A105221 a(n) is the sum of n's distinct prime factors below 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	9
15	8
16	2
17	0
18	5
19	0
20	7
21	10
22	13
23	0
24	5
25	5
26	15
27	3
28	9
29	0
30	10
31	0
32	2
33	14
34	19
35	12
36	5
37	0
38	21
39	16
40	7
41	0
42	12
43	0
44	13
45	8
46	25
47	0
48	5
49	7
50	7
51	20
52	15
53	0
54	5
55	16
56	9
57	22
58	31
59	0
60	10
61	0
62	33
63	10
64	2
65	18
66	16
67	0
68	19
69	26
70	14
71	0
72	5
73	0
74	39
75	8
76	21
77	18
78	18
79	0
80	7
81	3
82	43
83	0
84	12
85	22
86	45

[0, 0, 0, 2, 0, 5, 0, 2, 3, 7, 0, 5, 0, 9, 8, 2, 0, 5, 0, 7, 10, 13, 0, 5, 5, 15, 3, 9, 0, 10, 0, 2, 14, 19, 12, 5, 0, 21, 16, 7, 0, 12, 0, 13, 8, 25, 0, 5, 7, 7, 20, 15, 0, 5, 16, 9, 22, 31, 0, 10, 0, 33, 10, 2, 18, 16, 0, 19, 26, 14, 0, 5, 0, 39, 8, 21, 18, 18, 0, 7, 3, 43, 0, 12, 22, 45]

cp's OEIS Frontend

A105221 a(n) is the sum of n's distinct prime factors below 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	9
15	8
16	2
17	0
18	5
19	0
20	7
21	10
22	13
23	0
24	5
25	5
26	15
27	3
28	9
29	0
30	10
31	0
32	2
33	14
34	19
35	12
36	5
37	0
38	21
39	16
40	7
41	0
42	12
43	0
44	13
45	8
46	25
47	0
48	5
49	7
50	7
51	20
52	15
53	0
54	5
55	16
56	9
57	22
58	31
59	0
60	10
61	0
62	33
63	10
64	2
65	18
66	16
67	0
68	19
69	26
70	14
71	0
72	5
73	0
74	39
75	8
76	21
77	18
78	18
79	0
80	7
81	3
82	43
83	0
84	12
85	22
86	45

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

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