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 A049369 #10 Aug 13 2021 18:17:55 %S A049369 0,1,2,7,22,109,680,6144,72887,1061063,17540092,314631443 %N A049369 Number of n-node planar graphs with minimum degree at least 1. %Y A049369 Cf. A005470. %K A049369 nonn,nice,hard %O A049369 1,3 %A A049369 _Brendan McKay_ %E A049369 a(12) from _Sean A. Irvine_, Aug 13 2021