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 A322615 #10 Jan 07 2019 03:19:40 %S A322615 0,13,50,113,201,314,452,616,804,1018,1257,1521,1810,2124,2463,2827, %T A322615 3217,3632,4072,4536,5027,5542,6082,6648,7238,7854,8495,9161,9852, %U A322615 10568,11310,12076,12868,13685,14527,15394,16286,17203,18146,19113,20106,21124,22167 %N A322615 Nearest integer to 4*Pi*n^2. %C A322615 Surface area of a sphere of radius n, rounded to the nearest integer. %H A322615 Robert Israel, <a href="/A322615/b322615.txt">Table of n, a(n) for n = 0..10000</a> %p A322615 a:=n->4*Pi*n^2: seq(round(a(n)),n=0..45); # _Muniru A Asiru_, Dec 20 2018 %o A322615 (PARI) a(n) = round(4*Pi*n^2) %Y A322615 Cf. A002101, A075726, A075727. %K A322615 nonn %O A322615 0,2 %A A322615 _Felix Fröhlich_, Dec 20 2018