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 A030282 #9 Apr 22 2019 18:06:09
%S A030282 2,7,23,75,242,772,2430,7529,22941,68801,203488,594994,1724242,
%T A030282 4963041,14213111,40540661,115235882,326470662,921780312,2593408123,
%U A030282 7269728291,20302519239,56493171410,156652350614,433009258768
%N A030282 COMPOSE primes with natural numbers.
%H A030282 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>
%F A030282 G.f.: Sum_{k>=1} prime(k)*x^k/(1 - x)^(2*k). - _Ilya Gutkovskiy_, Apr 21 2019
%Y A030282 Cf. A030281.
%K A030282 nonn,nice
%O A030282 1,1
%A A030282 _Christian G. Bower_