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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.

A261208 Terms of the Leibniz formula (as Euler product) that generate successively better approximations to Pi.

Table of values

n a(n)
1 1
2 3
3 4
4 5
5 8
6 47
7 49
8 95
9 247
10 251
11 253
12 742
13 4268
14 4270
15 4288
16 11445
17 30123
18 30701
19 30703
20 62592
21 62690
22 62992
23 3535871
24 3535872
25 3664203
26 3664204
27 3664214
28 3664220
29 3665670
30 3665696
31 3665842
32 3665854
33 3665866
34 3708907
35 3708909
36 3708913
37 3708929
38 3708931
39 3708935
40 3708957
41 3708983
42 3708985
43 3709017

List of values

[1, 3, 4, 5, 8, 47, 49, 95, 247, 251, 253, 742, 4268, 4270, 4288, 11445, 30123, 30701, 30703, 62592, 62690, 62992, 3535871, 3535872, 3664203, 3664204, 3664214, 3664220, 3665670, 3665696, 3665842, 3665854, 3665866, 3708907, 3708909, 3708913, 3708929, 3708931, 3708935, 3708957, 3708983, 3708985, 3709017]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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