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A162830
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Number of reduced words of length n in Coxeter group on 28 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.
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0
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1, 28, 756, 20034, 530712, 14054040, 372171618, 9855587196, 260988761124, 6911320818402, 183020737961880, 4846626473132808, 128344953881202786, 3398740810188105564, 90003063973732401492, 2383397845569631005570
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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 A170747, 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)/(351*t^3 - 26*t^2 - 26*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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