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.

A162925 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.

Table of values

n a(n)
0 1
1 5
2 20
3 80
4 310
5 1200
6 4650
7 18000
8 69690
9 269820
10 1044630
11 4044420
12 15658470
13 60623640
14 234711810
15 908715240
16 3518201250
17 13621143060
18 52735907790
19 204173464860
20 790482339630
21 3060448278480
22 11848896802170
23 45874441471680

List of values

[1, 5, 20, 80, 310, 1200, 4650, 18000, 69690, 269820, 1044630, 4044420, 15658470, 60623640, 234711810, 908715240, 3518201250, 13621143060, 52735907790, 204173464860, 790482339630, 3060448278480, 11848896802170, 45874441471680]

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

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