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A170746
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Expansion of g.f.: (1+x)/(1-26*x).
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50
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1, 27, 702, 18252, 474552, 12338352, 320797152, 8340725952, 216858874752, 5638330743552, 146596599332352, 3811511582641152, 99099301148669952, 2576581829865418752, 66991127576500887552, 1741769316989023076352, 45286002241714599985152, 1177436058284579599613952
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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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MAPLE
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k:=27; seq(`if`(n=0, 1, k*(k-1)^(n-1)), n = 0..25); # G. C. Greubel, Sep 25 2019
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MATHEMATICA
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CoefficientList[Series[(1+x)/(1-26x), {x, 0, 20}], x] (* or *) Join[ {1}, NestList[26#&, 27, 20]] (* Harvey P. Dale, Jun 16 2016 *)
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PROG
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(Python) for i in range(31):print(i, 27*26**(i-1) if i>0 else 1) # Kenny Lau, Aug 03 2017
(PARI) vector(26, n, k=27; if(n==1, 1, k*(k-1)^(n-2))) \\ G. C. Greubel, Sep 25 2019
(Magma) k:=27; [1] cat [k*(k-1)^(n-1): n in [1..25]]; // G. C. Greubel, Sep 25 2019
(Sage) k=27; [1]+[k*(k-1)^(n-1) for n in (1..25)] # G. C. Greubel, Sep 25 2019
(GAP) k:=27;; Concatenation([1], List([1..25], n-> k*(k-1)^(n-1) )); # G. C. Greubel, Sep 25 2019
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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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