A335319 - cp's OEIS frontend

A335319 Decimal expansion of Sum_{n>=2} (-1)^n/(n*phi(n)), where phi(n) is the Euler totient function A000010.

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

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

cp's OEIS Frontend

A335319 Decimal expansion of Sum_{n>=2} (-1)^n/(n*phi(n)), where phi(n) is the Euler totient function A000010.

Table of values

List of values

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

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

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