A081573 - cp's OEIS frontend

A081573 Decimal expansion of Sum_(1/(2^q-1)) with the summation extending over all pairs of integers gcd(p,q) = 1, 0 < p/q < e = 2.718... .

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

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

cp's OEIS Frontend

A081573 Decimal expansion of Sum_(1/(2^q-1)) with the summation extending over all pairs of integers gcd(p,q) = 1, 0 < p/q < e = 2.718... .

Table of values

List of values

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

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

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