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Sum of the integer part of 7/2-th roots of integers less than n.
5

%I #6 Mar 21 2020 11:11:27

%S 0,1,2,3,4,5,6,7,8,9,10,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,

%T 41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,84,87,

%U 90,93,96,99,102,105,108,111,114,117,120,123,126,129,132,135,138,141

%N Sum of the integer part of 7/2-th roots of integers less than n.

%H Harvey P. Dale, <a href="/A032516/b032516.txt">Table of n, a(n) for n = 0..1000</a>

%t Accumulate[Floor[Surd[Range[0,70]^2,7]]] (* _Harvey P. Dale_, Mar 21 2020 *)

%K nonn

%O 0,3

%A Michel Tixier (tixier(AT)dyadel.net)