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A164687
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Number of reduced words of length n in Coxeter group on 43 generators S_i with relations (S_i)^2 = (S_i S_j)^7 = I.
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0
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1, 43, 1806, 75852, 3185784, 133802928, 5619722976, 236028364089, 9913191253812, 416354031068115, 17486869237997292, 734448505187617668, 30846837099932661024, 1295567153243385959664, 54413820228163207379946
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OFFSET
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0,2
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COMMENTS
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The initial terms coincide with those of A170762, although the two sequences are eventually different.
Computed with MAGMA using commands similar to those used to compute A154638.
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LINKS
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FORMULA
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G.f.: (t^7 + 2*t^6 + 2*t^5 + 2*t^4 + 2*t^3 + 2*t^2 + 2*t + 1)/(861*t^7 - 41*t^6 - 41*t^5 - 41*t^4 - 41*t^3 - 41*t^2 - 41*t + 1).
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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