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A008720
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Molien series for 3-dimensional group [2,5] = *225.
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2
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1, 0, 2, 0, 3, 1, 4, 2, 5, 3, 7, 4, 9, 5, 11, 7, 13, 9, 15, 11, 18, 13, 21, 15, 24, 18, 27, 21, 30, 24, 34, 27, 38, 30, 42, 34, 46, 38, 50, 42, 55, 46, 60, 50, 65, 55, 70, 60, 75, 65, 81, 70, 87, 75, 93, 81, 99, 87, 105, 93, 112, 99, 119, 105, 126, 112, 133, 119, 140, 126, 148, 133, 156
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OFFSET
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0,3
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LINKS
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MAPLE
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1/((1-x^2)^2*(1-x^5)); seq(coeff(series(%, x, n+1), x, n), n = 0 .. 80); # modified by G. C. Greubel, Sep 09 2019
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MATHEMATICA
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LinearRecurrence[{0, 2, 0, -1, 1, 0, -2, 0, 1}, {1, 0, 2, 0, 3, 1, 4, 2, 5}, 80] (* Harvey P. Dale, Dec 10 2015 *)
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PROG
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(PARI) my(x='x+O('x^80)); Vec(1/((1-x^2)^2*(1-x^5))) \\ G. C. Greubel, Sep 09 2019
(Magma) R<x>:=PowerSeriesRing(Integers(), 80); Coefficients(R!( 1/((1-x^2)^2*(1-x^5)) )); // G. C. Greubel, Sep 09 2019
(Sage)
P.<x> = PowerSeriesRing(ZZ, prec)
return P(1/((1-x^2)^2*(1-x^5))).list()
(GAP) a:=[1, 0, 2, 0, 3, 1, 4, 2, 5];; for n in [10..80] do a[n]:=2*a[n-2]-a[n-4] +a[n-5]-2*a[n-7]+a[n-9]; od; a; # G. C. Greubel, Sep 09 2019
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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