login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A162838 Number of reduced words of length n in Coxeter group on 34 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I. 0
1, 34, 1122, 36465, 1184832, 38489088, 1250311920, 40616040960, 1319401053696, 42860382335232, 1392307798818816, 45228738040578048, 1469243184987697152, 47727963019128471552, 1550429824846292189184, 50365288810019957047296 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The initial terms coincide with those of A170753, although the two sequences are eventually different.

Computed with MAGMA using commands similar to those used to compute A154638.

LINKS

Table of n, a(n) for n=0..15.

Index entries for linear recurrences with constant coefficients, signature (32, 32, -528).

FORMULA

G.f.: (t^3 + 2*t^2 + 2*t + 1)/(528*t^3 - 32*t^2 - 32*t + 1)

MATHEMATICA

coxG[{3, 528, -32}] (* The coxG program is at A169452 *) (* Harvey P. Dale, Oct 20 2015 *)

CROSSREFS

Sequence in context: A296724 A214190 A214241 * A163217 A163593 A164050

Adjacent sequences:  A162835 A162836 A162837 * A162839 A162840 A162841

KEYWORD

nonn

AUTHOR

John Cannon and N. J. A. Sloane, Dec 03 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 25 04:28 EDT 2022. Contains 356953 sequences. (Running on oeis4.)