A109693 - cp's OEIS frontend

A109693 Decimal expansion of Sum_{k>=1} 1/sigma(k)^2.

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

[1, 3, 0, 6, 4, 5, 6, 5, 1, 2, 0, 3, 8, 9, 5, 0, 5, 6, 8, 0, 1, 0, 7, 4, 9, 4, 8, 7, 0, 9, 1, 2, 7, 1, 5, 4, 9, 7, 5, 8, 3, 9, 0, 7, 9, 1, 5, 6, 6, 4, 9, 1, 0, 3, 7, 3, 6, 0, 9, 6, 9, 9, 5, 9, 8, 6, 1, 5, 3, 4, 2, 6, 4, 5, 7, 6, 6, 8, 2, 8, 7, 1, 5, 9, 9, 8, 1]

cp's OEIS Frontend

A109693 Decimal expansion of Sum_{k>=1} 1/sigma(k)^2.

Table of values

List of values

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

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

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