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A017212
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a(n) = (9*n + 4)^4.
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1
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256, 28561, 234256, 923521, 2560000, 5764801, 11316496, 20151121, 33362176, 52200625, 78074896, 112550881, 157351936, 214358881, 285610000, 373301041, 479785216, 607573201, 759333136, 937890625
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listen;
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text;
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: ( -256 - 27281*x - 94011*x^2 - 35291*x^3 - 625*x^4 ) / (x-1)^5. - R. J. Mathar, Jul 14 2016
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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