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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.

A068205 Denominator of S(n)/Pi^n, where S(n) = Sum((4k+1)^(-n),k,-inf,+inf).

Table of values

n a(n)
1 4
2 8
3 32
4 96
5 1536
6 960
7 184320
8 161280
9 8257536
10 2903040
11 14863564800
12 638668800
13 1569592442880
14 49816166400
15 5713316492083200
16 83691159552000
17 1096956766479974400
18 2845499424768000
19 6713375410857443328000

List of values

[4, 8, 32, 96, 1536, 960, 184320, 161280, 8257536, 2903040, 14863564800, 638668800, 1569592442880, 49816166400, 5713316492083200, 83691159552000, 1096956766479974400, 2845499424768000, 6713375410857443328000]

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

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