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%I #16 May 08 2020 15:26:37
%S 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,17,19,21,23,25,27,29,31,33,35,
%T 37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,
%U 83,85,87,89,91,93,95,97,99,101,103,105,107,109,111,113,115,117,119
%N Sum of the integer part of 4th roots of integers <= n.
%F G.f.: Sum_{k>=1} x^(k^4)/(1 - x)^2. - _Ilya Gutkovskiy_, Dec 22 2016
%o (PARI) a(n) = sum(k=1, n, sqrtnint(k, 4)); \\ _Michel Marcus_, Mar 12 2016
%Y Cf. A022554, A031876, A032513.
%Y Partial sums of A255270.
%K nonn
%O 0,3
%A Michel Tixier (tixier(AT)dyadel.net)
%E NAME adapted to offset. - _Giovanni Resta_, May 08 2020
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