A228639 - cp's OEIS frontend

A228639 Decimal expansion of Sum_{n>=1} (-1)^floor(n*sqrt(2))/n.

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

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

cp's OEIS Frontend

A228639 Decimal expansion of Sum_{n>=1} (-1)^floor(n*sqrt(2))/n.

Table of values

List of values

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

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

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