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A090176
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G.f.: (1+x^9)/((1-x^4)(1-x^6)(1-x^12)).
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0
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1, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 3, 1, 1, 1, 3, 1, 3, 1, 3, 3, 3, 1, 6, 3, 3, 3, 6, 3, 6, 3, 6, 6, 6, 3, 10, 6, 6, 6, 10, 6, 10, 6, 10, 10, 10, 6, 15, 10, 10, 10, 15, 10, 15, 10, 15, 15, 15, 10, 21, 15, 15, 15, 21, 15, 21, 15, 21, 21, 21, 15, 28, 21, 21, 21, 28, 21, 28, 21, 28, 28, 28, 21, 36
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OFFSET
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0,13
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COMMENTS
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Harmonic Molien series for real Clifford group C_2 of order 2304 is (1+x^18)/((1-x^8)(1-x^12)(1-x^24)).
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (0, 0, 1, 1, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, -1, -1, 0, 0, 1).
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FORMULA
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G.f.: ( -1-x^6+x^3 ) / ( (1+x^2-x)*(x^4-x^2+1)*(1+x)^2*(1+x+x^2)^2*(x^2+1)^2*(x-1)^3 ). - R. J. Mathar, Dec 18 2014
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PROG
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(PARI) Vec((1+x^9)/((1-x^4)*(1-x^6)*(1-x^12)) + O(x^80)) \\ Jinyuan Wang, Mar 10 2020
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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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