A367325 - cp's OEIS frontend

A367325 Decimal expansion of Sum_{k>=1} sigma(k)/(2^k-1), where sigma(k) is the sum of divisors of k (A000203).

n	a(n)
1	3
2	6
3	0
4	4
5	4
6	4
7	7
8	3
9	4
10	1
11	9
12	7
13	1
14	9
15	4
16	6
17	7
18	4
19	4
20	8
21	9
22	3
23	6
24	4
25	8
26	4
27	7
28	3
29	6
30	2
31	3
32	5
33	8
34	8
35	3
36	5
37	6
38	0
39	0
40	4
41	9
42	5
43	4
44	8
45	7
46	0
47	6
48	4
49	9
50	9
51	8
52	7
53	5
54	0
55	1
56	3
57	8
58	3
59	6
60	2
61	6
62	3
63	1
64	5
65	0
66	9
67	6
68	6
69	2
70	9
71	5
72	0
73	1
74	7
75	0
76	7
77	1
78	3
79	4
80	9
81	6
82	6
83	9
84	1
85	7
86	8
87	2
88	2
89	8
90	9
91	9
92	1
93	6
94	9
95	9
96	2
97	7
98	5
99	4
100	4
101	2
102	7
103	0
104	3
105	8

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

cp's OEIS Frontend

A367325 Decimal expansion of Sum_{k>=1} sigma(k)/(2^k-1), where sigma(k) is the sum of divisors of k (A000203).

Table of values

List of values

n	a(n)
1	3
2	6
3	0
4	4
5	4
6	4
7	7
8	3
9	4
10	1
11	9
12	7
13	1
14	9
15	4
16	6
17	7
18	4
19	4
20	8
21	9
22	3
23	6
24	4
25	8
26	4
27	7
28	3
29	6
30	2
31	3
32	5
33	8
34	8
35	3
36	5
37	6
38	0
39	0
40	4
41	9
42	5
43	4
44	8
45	7
46	0
47	6
48	4
49	9
50	9
51	8
52	7
53	5
54	0
55	1
56	3
57	8
58	3
59	6
60	2
61	6
62	3
63	1
64	5
65	0
66	9
67	6
68	6
69	2
70	9
71	5
72	0
73	1
74	7
75	0
76	7
77	1
78	3
79	4
80	9
81	6
82	6
83	9
84	1
85	7
86	8
87	2
88	2
89	8
90	9
91	9
92	1
93	6
94	9
95	9
96	2
97	7
98	5
99	4
100	4
101	2
102	7
103	0
104	3
105	8

n	a(n)
1	3
2	6
3	0
4	4
5	4
6	4
7	7
8	3
9	4
10	1
11	9
12	7
13	1
14	9
15	4
16	6
17	7
18	4
19	4
20	8
21	9
22	3
23	6
24	4
25	8
26	4
27	7
28	3
29	6
30	2
31	3
32	5
33	8
34	8
35	3
36	5
37	6
38	0
39	0
40	4
41	9
42	5
43	4
44	8
45	7
46	0
47	6
48	4
49	9
50	9
51	8
52	7
53	5
54	0
55	1
56	3
57	8
58	3
59	6
60	2
61	6
62	3
63	1
64	5
65	0
66	9
67	6
68	6
69	2
70	9
71	5
72	0
73	1
74	7
75	0
76	7
77	1
78	3
79	4
80	9
81	6
82	6
83	9
84	1
85	7
86	8
87	2
88	2
89	8
90	9
91	9
92	1
93	6
94	9
95	9
96	2
97	7
98	5
99	4
100	4
101	2
102	7
103	0
104	3
105	8

n	a(n)
1	3
2	6
3	0
4	4
5	4
6	4
7	7
8	3
9	4
10	1
11	9
12	7
13	1
14	9
15	4
16	6
17	7
18	4
19	4
20	8
21	9
22	3
23	6
24	4
25	8
26	4
27	7
28	3
29	6
30	2
31	3
32	5
33	8
34	8
35	3
36	5
37	6
38	0
39	0
40	4
41	9
42	5
43	4
44	8
45	7
46	0
47	6
48	4
49	9
50	9
51	8
52	7
53	5
54	0
55	1
56	3
57	8
58	3
59	6
60	2
61	6
62	3
63	1
64	5
65	0
66	9
67	6
68	6
69	2
70	9
71	5
72	0
73	1
74	7
75	0
76	7
77	1
78	3
79	4
80	9
81	6
82	6
83	9
84	1
85	7
86	8
87	2
88	2
89	8
90	9
91	9
92	1
93	6
94	9
95	9
96	2
97	7
98	5
99	4
100	4
101	2
102	7
103	0
104	3
105	8