A227989 - cp's OEIS frontend

A227989 Decimal expansion of Sum_{n >= 1} sigma_2(n)/n!.

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

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

cp's OEIS Frontend

A227989 Decimal expansion of Sum_{n >= 1} sigma_2(n)/n!.

Table of values

List of values

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

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

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