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 A228189 #33 Nov 03 2024 06:16:14
%S A228189 0,2,7,16,32,56,89,134,190,261,348,452,575,718,883,1072,1286,1526,
%T A228189 1795,2094,2424,2787,3185,3619,4090,4601,5152,5747,6385,7068,7799,
%U A228189 8578,9408,10289,11224,12214,13260,14365,15529,16755,18043,19396,20814,22301,23856,25482
%N A228189 Volume of right circular cone (rounded down) with the diameter of base and height equal to n.
%H A228189 Georg Fischer, <a href="/A228189/b228189.txt">Table of n, a(n) for n = 1..1000</a> [first 574 terms from _K. D. Bajpai_]
%F A228189 a(n) = floor((Pi*n^3)/12).
%e A228189 a(3) = 7 because volume = ((Pi*n^2)/4)*(n/3) = ((Pi*3*3)/4)*(3/3) = 7.06858 and floor(7.06858) = 7.
%p A228189 a:= n-> floor((Pi*n^3)/12):
%p A228189 seq(a(n), n=1..48);
%t A228189 Table[Floor[(Pi n^3)/12],{n,50}] (* _Harvey P. Dale_, May 25 2019 *)
%o A228189 (PARI) a(n)=Pi*n^3\12 \\ _Charles R Greathouse IV_, Aug 25 2014
%K A228189 nonn,easy
%O A228189 1,2
%A A228189 _K. D. Bajpai_, Aug 17 2013