A243983 - cp's OEIS frontend

A243983 Sum of twin divisors of n.

n	a(n)
1	0
2	0
3	4
4	6
5	0
6	4
7	0
8	6
9	4
10	0
11	0
12	16
13	0
14	0
15	9
16	6
17	0
18	4
19	0
20	6
21	4
22	0
23	0
24	24
25	0
26	0
27	4
28	6
29	0
30	9
31	0
32	6
33	4
34	0
35	12
36	16
37	0
38	0
39	4
40	24
41	0
42	4
43	0
44	6
45	9
46	0
47	0
48	24
49	0
50	0
51	4
52	6
53	0
54	4
55	0
56	6
57	4
58	0
59	0
60	43
61	0
62	0
63	20
64	6
65	0
66	4
67	0
68	6
69	4
70	12
71	0
72	24
73	0
74	0
75	9
76	6
77	0
78	4
79	0
80	24
81	4
82	0
83	0
84	42
85	0
86	0
87	4
88	6
89	0
90	9

[0, 0, 4, 6, 0, 4, 0, 6, 4, 0, 0, 16, 0, 0, 9, 6, 0, 4, 0, 6, 4, 0, 0, 24, 0, 0, 4, 6, 0, 9, 0, 6, 4, 0, 12, 16, 0, 0, 4, 24, 0, 4, 0, 6, 9, 0, 0, 24, 0, 0, 4, 6, 0, 4, 0, 6, 4, 0, 0, 43, 0, 0, 20, 6, 0, 4, 0, 6, 4, 12, 0, 24, 0, 0, 9, 6, 0, 4, 0, 24, 4, 0, 0, 42, 0, 0, 4, 6, 0, 9]

cp's OEIS Frontend

A243983 Sum of twin divisors of n.

Table of values

List of values

n	a(n)
1	0
2	0
3	4
4	6
5	0
6	4
7	0
8	6
9	4
10	0
11	0
12	16
13	0
14	0
15	9
16	6
17	0
18	4
19	0
20	6
21	4
22	0
23	0
24	24
25	0
26	0
27	4
28	6
29	0
30	9
31	0
32	6
33	4
34	0
35	12
36	16
37	0
38	0
39	4
40	24
41	0
42	4
43	0
44	6
45	9
46	0
47	0
48	24
49	0
50	0
51	4
52	6
53	0
54	4
55	0
56	6
57	4
58	0
59	0
60	43
61	0
62	0
63	20
64	6
65	0
66	4
67	0
68	6
69	4
70	12
71	0
72	24
73	0
74	0
75	9
76	6
77	0
78	4
79	0
80	24
81	4
82	0
83	0
84	42
85	0
86	0
87	4
88	6
89	0
90	9

n	a(n)
1	0
2	0
3	4
4	6
5	0
6	4
7	0
8	6
9	4
10	0
11	0
12	16
13	0
14	0
15	9
16	6
17	0
18	4
19	0
20	6
21	4
22	0
23	0
24	24
25	0
26	0
27	4
28	6
29	0
30	9
31	0
32	6
33	4
34	0
35	12
36	16
37	0
38	0
39	4
40	24
41	0
42	4
43	0
44	6
45	9
46	0
47	0
48	24
49	0
50	0
51	4
52	6
53	0
54	4
55	0
56	6
57	4
58	0
59	0
60	43
61	0
62	0
63	20
64	6
65	0
66	4
67	0
68	6
69	4
70	12
71	0
72	24
73	0
74	0
75	9
76	6
77	0
78	4
79	0
80	24
81	4
82	0
83	0
84	42
85	0
86	0
87	4
88	6
89	0
90	9

n	a(n)
1	0
2	0
3	4
4	6
5	0
6	4
7	0
8	6
9	4
10	0
11	0
12	16
13	0
14	0
15	9
16	6
17	0
18	4
19	0
20	6
21	4
22	0
23	0
24	24
25	0
26	0
27	4
28	6
29	0
30	9
31	0
32	6
33	4
34	0
35	12
36	16
37	0
38	0
39	4
40	24
41	0
42	4
43	0
44	6
45	9
46	0
47	0
48	24
49	0
50	0
51	4
52	6
53	0
54	4
55	0
56	6
57	4
58	0
59	0
60	43
61	0
62	0
63	20
64	6
65	0
66	4
67	0
68	6
69	4
70	12
71	0
72	24
73	0
74	0
75	9
76	6
77	0
78	4
79	0
80	24
81	4
82	0
83	0
84	42
85	0
86	0
87	4
88	6
89	0
90	9