A343469 - cp's OEIS frontend

A343469 Decimal expansion of Sum_{n>=1} (-1)^(n-1)/(n*arctan(n)).

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

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

cp's OEIS Frontend

A343469 Decimal expansion of Sum_{n>=1} (-1)^(n-1)/(n*arctan(n)).

Table of values

List of values

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

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

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