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 A099800 #9 Aug 19 2019 05:11:27 %S A099800 2,30,2310,510510,223092870,200560490130,304250263527210, %T A099800 614889782588491410,1922760350154212639070,7858321551080267055879090, %U A099800 40729680599249024150621323470,267064515689275851355624017992790 %N A099800 Bisection of A002110. %p A099800 a:=n->product(ithprime(j),j=1..2*n+1): seq(a(n),n=0..13); # _Emeric Deutsch_, Feb 23 2005 %Y A099800 Cf. A002110, A099788. %K A099800 nonn,easy %O A099800 0,1 %A A099800 _N. J. A. Sloane_, Nov 19 2004 %E A099800 More terms from _Emeric Deutsch_, Feb 23 2005