cp's OEIS Frontend

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.

A165757 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^10 = 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 1310710
11 5242800
12 20971050
13 83883600
14 335532000
15 1342118400
16 5368435200
17 21473587200
18 85893734400
19 343572480000
20 1374280089690
21 5497081037820
22 21988166868630
23 87952038348420

List of values

[1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327680, 1310710, 5242800, 20971050, 83883600, 335532000, 1342118400, 5368435200, 21473587200, 85893734400, 343572480000, 1374280089690, 5497081037820, 21988166868630, 87952038348420]

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

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