cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A216547 Decimal expansion of 2*Sum_{k=1..5000000} (-1)^(k-1)/(2k-1).

Table of values

n a(n)
1 1
2 5
3 7
4 0
5 7
6 9
7 6
8 2
9 2
10 6
11 7
12 9
13 4
14 8
15 9
16 6
17 6
18 1
19 9
20 2
21 3
22 2
23 3
24 2
25 1
26 6
27 9
28 1
29 6
30 3
31 9
32 7
33 5
34 1
35 3
36 9
37 2
38 0
39 9
40 8
41 5
42 8
43 4
44 6
45 9
46 9
47 6
48 9
49 3
50 6
51 5
52 2
53 9
54 1
55 0
56 4
57 8
58 7
59 4
60 7
61 0
62 9
63 1
64 1
65 1
66 5
67 3
68 9
69 0
70 8
71 2
72 0
73 3
74 6
75 4
76 8
77 3
78 1
79 4
80 4
81 9
82 9
83 3
84 1
85 3
86 7
87 4
88 7
89 1
90 3
91 6
92 1
93 7
94 1
95 0
96 5
97 8
98 7
99 3
100 3
101 3
102 5
103 2
104 0
105 5
106 5
107 0
108 4
109 3
110 0
111 6
112 2
113 7
114 2
115 6
116 0
117 3
118 1
119 8
120 7
121 3
122 7
123 8
124 7
125 4

List of values

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