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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.

A166859 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^13 = 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 5242880
12 20971520
13 83886070
14 335544240
15 1342176810
16 5368706640
17 21474824160
18 85899287040
19 343597109760
20 1374388285440
21 5497552527360
22 21990207651840
23 87960820776960

List of values

[1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327680, 1310720, 5242880, 20971520, 83886070, 335544240, 1342176810, 5368706640, 21474824160, 85899287040, 343597109760, 1374388285440, 5497552527360, 21990207651840, 87960820776960]

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

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