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A016767
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a(n) = (3*n)^3.
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8
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0, 27, 216, 729, 1728, 3375, 5832, 9261, 13824, 19683, 27000, 35937, 46656, 59319, 74088, 91125, 110592, 132651, 157464, 185193, 216000, 250047, 287496, 328509, 373248, 421875, 474552, 531441, 592704
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: 27*x*(1+4*x+x^2)/(x-1)^4 . - R. J. Mathar, Jul 07 2017
E.g.f.: 27*x*(1 + 3*x + x^2)*exp(x). - G. C. Greubel, Sep 15 2018
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EXAMPLE
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G.f. = 27*x + 216*x^2 + 729*x^3 * 1728*x^4 + 3375*x^5 + 5832*x^6 + ... - Michael Somos, Sep 16 2018
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MATHEMATICA
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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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