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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.

A166331 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^11 = I.

Table of values

n a(n)
0 1
1 5
2 20
3 80
4 320
5 1280
6 5120
7 20480
8 81920
9 327680
10 1310720
11 5242870
12 20971440
13 83885610
14 335541840
15 1342164960
16 5368650240
17 21474562560
18 85898096640
19 343591772160
20 1374364631040
21 5497448693760
22 21989755453530
23 87958864528380

List of values

[1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327680, 1310720, 5242870, 20971440, 83885610, 335541840, 1342164960, 5368650240, 21474562560, 85898096640, 343591772160, 1374364631040, 5497448693760, 21989755453530, 87958864528380]

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

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