This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A228272 #21 Nov 03 2024 06:15:55 %S A228272 0,4,14,33,65,113,179,268,381,523,696,904,1150,1436,1767,2144,2572, %T A228272 3053,3591,4188,4849,5575,6370,7238,8181,9202,10305,11494,12770,14137, %U A228272 15598,17157,18816,20579,22449,24429,26521,28730,31059,33510,36086,38792,41629,44602 %N A228272 Volume of sphere (rounded down) with the diameter equal to n. %H A228272 Georg Fischer, <a href="/A228272/b228272.txt">Table of n, a(n) for n = 1..5000</a> [first 578 terms from _K. D. Bajpai_] %F A228272 a(n) = floor((Pi*n^3)/6). %e A228272 a(6)=113 since volume is (Pi*n^3)/6 = Pi*6^3/6 = 113.0973355 and floor(113.0973355) = 113. %p A228272 a:= n-> floor((Pi*n^3)/6): %p A228272 seq(a(n), n=1..100); %Y A228272 Cf. A019673 (Pi/6). %Y A228272 Cf. A066645 (volume with radius n). %Y A228272 Cf. A228189 (similar sequence for right circular cone). %K A228272 nonn,easy %O A228272 1,2 %A A228272 _K. D. Bajpai_, Aug 19 2013