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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.

A163091 Number of reduced words of length n in Coxeter group on 15 generators S_i with relations (S_i)^2 = (S_i S_j)^4 = I.

Table of values

n a(n)
0 1
1 15
2 210
3 2940
4 41055
5 573300
6 8005725
7 111793500
8 1561106820
9 21799608285
10 304414090890
11 4250899269435
12 59360407871310
13 828920611657320
14 11575213262103855
15 161638593827703720
16 2257153663002754425
17 31519345335542489880
18 440142444293996873520
19 6146237150764726493205

List of values

[1, 15, 210, 2940, 41055, 573300, 8005725, 111793500, 1561106820, 21799608285, 304414090890, 4250899269435, 59360407871310, 828920611657320, 11575213262103855, 161638593827703720, 2257153663002754425, 31519345335542489880, 440142444293996873520, 6146237150764726493205]

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

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