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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.

A303989 Triangle read by rows: denominators of c_{n,k}, n >= 0, k = 0..n, used in the proof that Zeta(3) is irrational.

Table of values

n a(n)
0 1
1 1
2 4
3 8
4 24
5 96
6 216
7 54
8 4320
9 864
10 1728
11 8640
12 1728
13 60480
14 48384
15 216000
16 216000
17 1512000
18 1512000
19 6048000
20 1209600
21 24000
22 56000
23 21000
24 324000
25 18144000
26 39916800
27 5702400
28 8232000
29 8232000
30 9261000
31 55566000
32 9779616000
33 1955923200
34 25427001600
35 25427001600
36 65856000
37 197568000
38 197568000
39 19559232000
40 19559232000
41 50854003200
42 4623091200
43 50854003200
44 203416012800

List of values

[1, 1, 4, 8, 24, 96, 216, 54, 4320, 864, 1728, 8640, 1728, 60480, 48384, 216000, 216000, 1512000, 1512000, 6048000, 1209600, 24000, 56000, 21000, 324000, 18144000, 39916800, 5702400, 8232000, 8232000, 9261000, 55566000, 9779616000, 1955923200, 25427001600, 25427001600, 65856000, 197568000, 197568000, 19559232000, 19559232000, 50854003200, 4623091200, 50854003200, 203416012800]

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

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