A247194 a(n) = ceiling(Pi*n^3).
0, 4, 26, 85, 202, 393, 679, 1078, 1609, 2291, 3142, 4182, 5429, 6903, 8621, 10603, 12868, 15435, 18322, 21549, 25133, 29095, 33452, 38224, 43430, 49088, 55217, 61836, 68965, 76621, 84824, 93592, 102944, 112900, 123478, 134696, 146575, 159132, 172386, 186357, 201062, 216522, 232755
Offset: 0
Programs
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Mathematica
Ceiling[Pi*Range[0,50]^3] (* Harvey P. Dale, May 22 2016 *)
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PARI
vector(100,n,ceil(Pi*(n-1)^3)) \\ Derek Orr, Nov 26 2014
Formula
a(n) = A121381(n^3). - R. J. Mathar, Nov 27 2014