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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.

A165185 Number of reduced words of length n in Coxeter group on 5 generators S_i with relations (S_i)^2 = (S_i S_j)^9 = 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 327670
10 1310640
11 5242410
12 20969040
13 83873760
14 335485440
15 1341903360
16 5367459840
17 21469224960
18 85874442330
19 343487939580
20 1373912440470
21 5495492494980
22 21981340930320
23 87922847594880

List of values

[1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327670, 1310640, 5242410, 20969040, 83873760, 335485440, 1341903360, 5367459840, 21469224960, 85874442330, 343487939580, 1373912440470, 5495492494980, 21981340930320, 87922847594880]

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

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