A067392 - cp's OEIS frontend

A067392 Sum of numbers <= n which have common prime factors with n.

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	15
7	7
8	20
9	18
10	35
11	11
12	54
13	13
14	63
15	60
16	72
17	17
18	117
19	19
20	130
21	105
22	143
23	23
24	204
25	75
26	195
27	135
28	238
29	29
30	345
31	31
32	272
33	231
34	323
35	210
36	450
37	37
38	399
39	312
40	500
41	41
42	651
43	43
44	550
45	495
46	575
47	47
48	792
49	196
50	775
51	510
52	754
53	53
54	999
55	440
56	924
57	627
58	899
59	59

[0, 2, 3, 6, 5, 15, 7, 20, 18, 35, 11, 54, 13, 63, 60, 72, 17, 117, 19, 130, 105, 143, 23, 204, 75, 195, 135, 238, 29, 345, 31, 272, 231, 323, 210, 450, 37, 399, 312, 500, 41, 651, 43, 550, 495, 575, 47, 792, 196, 775, 510, 754, 53, 999, 440, 924, 627, 899, 59]

cp's OEIS Frontend

A067392 Sum of numbers <= n which have common prime factors with n.

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	15
7	7
8	20
9	18
10	35
11	11
12	54
13	13
14	63
15	60
16	72
17	17
18	117
19	19
20	130
21	105
22	143
23	23
24	204
25	75
26	195
27	135
28	238
29	29
30	345
31	31
32	272
33	231
34	323
35	210
36	450
37	37
38	399
39	312
40	500
41	41
42	651
43	43
44	550
45	495
46	575
47	47
48	792
49	196
50	775
51	510
52	754
53	53
54	999
55	440
56	924
57	627
58	899
59	59

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	15
7	7
8	20
9	18
10	35
11	11
12	54
13	13
14	63
15	60
16	72
17	17
18	117
19	19
20	130
21	105
22	143
23	23
24	204
25	75
26	195
27	135
28	238
29	29
30	345
31	31
32	272
33	231
34	323
35	210
36	450
37	37
38	399
39	312
40	500
41	41
42	651
43	43
44	550
45	495
46	575
47	47
48	792
49	196
50	775
51	510
52	754
53	53
54	999
55	440
56	924
57	627
58	899
59	59

n	a(n)
1	0
2	2
3	3
4	6
5	5
6	15
7	7
8	20
9	18
10	35
11	11
12	54
13	13
14	63
15	60
16	72
17	17
18	117
19	19
20	130
21	105
22	143
23	23
24	204
25	75
26	195
27	135
28	238
29	29
30	345
31	31
32	272
33	231
34	323
35	210
36	450
37	37
38	399
39	312
40	500
41	41
42	651
43	43
44	550
45	495
46	575
47	47
48	792
49	196
50	775
51	510
52	754
53	53
54	999
55	440
56	924
57	627
58	899
59	59