A335763 - cp's OEIS frontend

A335763 Decimal expansion of Sum_{k>=1} sigma_2(k)/2^k where sigma_2(k) is the sum of squares of divisors of k (A001157).

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

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

cp's OEIS Frontend

A335763 Decimal expansion of Sum_{k>=1} sigma_2(k)/2^k where sigma_2(k) is the sum of squares of divisors of k (A001157).

Table of values

List of values

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

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

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