A211779 - cp's OEIS frontend

A211779 a(n) = Sum_{d_ sigma(d_ where d_ divisors of n that are less than n, sigma(x) = A000203(x).

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	8
7	1
8	11
9	5
10	10
11	1
12	27
13	1
14	12
15	11
16	26
17	1
18	33
19	1
20	35
21	13
22	16
23	1
24	70
25	7
26	18
27	18
28	43
29	1
30	68
31	1
32	57
33	17
34	22
35	15
36	107
37	1
38	24
39	19
40	92
41	1
42	84
43	1
44	59
45	48
46	28
47	1
48	161
49	9
50	59
51	23
52	67
53	1
54	112
55	19
56	114
57	25
58	34
59	1
60	217
61	1
62	36
63	58
64	120
65	21
66	116
67	1
68	83
69	29

[0, 1, 1, 4, 1, 8, 1, 11, 5, 10, 1, 27, 1, 12, 11, 26, 1, 33, 1, 35, 13, 16, 1, 70, 7, 18, 18, 43, 1, 68, 1, 57, 17, 22, 15, 107, 1, 24, 19, 92, 1, 84, 1, 59, 48, 28, 1, 161, 9, 59, 23, 67, 1, 112, 19, 114, 25, 34, 1, 217, 1, 36, 58, 120, 21, 116, 1, 83, 29]

cp's OEIS Frontend

A211779 a(n) = Sum_{d_ sigma(d_ where d_ divisors of n that are less than n, sigma(x) = A000203(x).

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	8
7	1
8	11
9	5
10	10
11	1
12	27
13	1
14	12
15	11
16	26
17	1
18	33
19	1
20	35
21	13
22	16
23	1
24	70
25	7
26	18
27	18
28	43
29	1
30	68
31	1
32	57
33	17
34	22
35	15
36	107
37	1
38	24
39	19
40	92
41	1
42	84
43	1
44	59
45	48
46	28
47	1
48	161
49	9
50	59
51	23
52	67
53	1
54	112
55	19
56	114
57	25
58	34
59	1
60	217
61	1
62	36
63	58
64	120
65	21
66	116
67	1
68	83
69	29

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	8
7	1
8	11
9	5
10	10
11	1
12	27
13	1
14	12
15	11
16	26
17	1
18	33
19	1
20	35
21	13
22	16
23	1
24	70
25	7
26	18
27	18
28	43
29	1
30	68
31	1
32	57
33	17
34	22
35	15
36	107
37	1
38	24
39	19
40	92
41	1
42	84
43	1
44	59
45	48
46	28
47	1
48	161
49	9
50	59
51	23
52	67
53	1
54	112
55	19
56	114
57	25
58	34
59	1
60	217
61	1
62	36
63	58
64	120
65	21
66	116
67	1
68	83
69	29

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	8
7	1
8	11
9	5
10	10
11	1
12	27
13	1
14	12
15	11
16	26
17	1
18	33
19	1
20	35
21	13
22	16
23	1
24	70
25	7
26	18
27	18
28	43
29	1
30	68
31	1
32	57
33	17
34	22
35	15
36	107
37	1
38	24
39	19
40	92
41	1
42	84
43	1
44	59
45	48
46	28
47	1
48	161
49	9
50	59
51	23
52	67
53	1
54	112
55	19
56	114
57	25
58	34
59	1
60	217
61	1
62	36
63	58
64	120
65	21
66	116
67	1
68	83
69	29