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.

A163316 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^5 = I.

Table of values

n a(n)
0 1
1 5
2 20
3 80
4 320
5 1270
6 5040
7 20010
8 79440
9 315360
10 1251930
11 4969980
12 19730070
13 78325380
14 310939920
15 1234384470
16 4900319640
17 19453527810
18 77227563240
19 306581745960
20 1217083163130
21 4831636082580
22 19180864497870
23 76145131089180

List of values

[1, 5, 20, 80, 320, 1270, 5040, 20010, 79440, 315360, 1251930, 4969980, 19730070, 78325380, 310939920, 1234384470, 4900319640, 19453527810, 77227563240, 306581745960, 1217083163130, 4831636082580, 19180864497870, 76145131089180]

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

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