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%I #16 May 08 2020 12:01:14
%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,
%T 26,27,28,29,30,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,
%U 67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99,101,103,105,107
%N Sum of the integer part of 5th roots of positive integers less than or equal to n.
%F G.f.: Sum_{k>=1} x^(k^5)/(1 - x)^2. - _Ilya Gutkovskiy_, Dec 22 2016
%t Accumulate[Floor[Surd[Range[0,70],5]]] (* _Harvey P. Dale_, Jan 21 2019 *)
%o (PARI) a(n) = sum(k=1, n, sqrtnint(k, 5)); \\ _Michel Marcus_, Mar 12 2016
%Y Cf. A022554, A031876, A032512.
%Y Partial sums of A178487.
%K nonn
%O 0,3
%A Michel Tixier (tixier(AT)dyadel.net)
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