login
A162812
Number of reduced words of length n in Coxeter group on 26 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.
0
1, 26, 650, 15925, 390000, 9547200, 233715300, 5721300000, 140056207200, 3428545582800, 83930052960000, 2054589502867200, 50295905665012800, 1231232868141120000, 30140313720487027200, 737828346427571692800
OFFSET
0,2
COMMENTS
The initial terms coincide with those of A170745, although the two sequences are eventually different.
Computed with MAGMA using commands similar to those used to compute A154638.
FORMULA
G.f.: (t^3 + 2*t^2 + 2*t + 1)/(300*t^3 - 24*t^2 - 24*t + 1)
CROSSREFS
Sequence in context: A014913 A285397 A106793 * A163177 A163526 A163995
KEYWORD
nonn
AUTHOR
John Cannon and N. J. A. Sloane, Dec 03 2009
STATUS
approved