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A162768
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Number of reduced words of length n in Coxeter group on 13 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.
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0
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1, 13, 156, 1794, 20592, 235950, 2703558, 30975516, 354897114, 4066164102, 46587289320, 533764778118, 6115505911086, 70067216486124, 802781471013522, 9197712172364430, 105380993789073288, 1207382188488922446
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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 A170732, 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^3 + 2*t^2 + 2*t + 1)/(66*t^3 - 11*t^2 - 11*t + 1)
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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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