cp's OEIS Frontend

A169503 Number of reduced words of length n in Coxeter group on 10 generators S_i with relations (S_i)^2 = (S_i S_j)^34 = I.

%I A169503 #6 Nov 26 2016 07:32:17
%S A169503 1,10,90,810,7290,65610,590490,5314410,47829690,430467210,3874204890,
%T A169503 34867844010,313810596090,2824295364810,25418658283290,
%U A169503 228767924549610,2058911320946490,18530201888518410,166771816996665690
%N A169503 Number of reduced words of length n in Coxeter group on 10 generators S_i with relations (S_i)^2 = (S_i S_j)^34 = I.
%C A169503 The initial terms coincide with those of A003952, although the two sequences are eventually different.
%C A169503 Computed with MAGMA using commands similar to those used to compute A154638.
%H A169503 <a href="/index/Rec#order_34">Index entries for linear recurrences with constant coefficients</a>, signature (8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, -36).
%F A169503 G.f. (t^34 + 2*t^33 + 2*t^32 + 2*t^31 + 2*t^30 + 2*t^29 + 2*t^28 + 2*t^27 +
%F A169503 2*t^26 + 2*t^25 + 2*t^24 + 2*t^23 + 2*t^22 + 2*t^21 + 2*t^20 + 2*t^19 +
%F A169503 2*t^18 + 2*t^17 + 2*t^16 + 2*t^15 + 2*t^14 + 2*t^13 + 2*t^12 + 2*t^11 +
%F A169503 2*t^10 + 2*t^9 + 2*t^8 + 2*t^7 + 2*t^6 + 2*t^5 + 2*t^4 + 2*t^3 + 2*t^2 +
%F A169503 2*t + 1)/(36*t^34 - 8*t^33 - 8*t^32 - 8*t^31 - 8*t^30 - 8*t^29 - 8*t^28
%F A169503 - 8*t^27 - 8*t^26 - 8*t^25 - 8*t^24 - 8*t^23 - 8*t^22 - 8*t^21 - 8*t^20
%F A169503 - 8*t^19 - 8*t^18 - 8*t^17 - 8*t^16 - 8*t^15 - 8*t^14 - 8*t^13 - 8*t^12
%F A169503 - 8*t^11 - 8*t^10 - 8*t^9 - 8*t^8 - 8*t^7 - 8*t^6 - 8*t^5 - 8*t^4 -
%F A169503 8*t^3 - 8*t^2 - 8*t + 1)
%K A169503 nonn
%O A169503 0,2
%A A169503 _John Cannon_ and _N. J. A. Sloane_, Dec 03 2009