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 A345349 #9 Jun 19 2021 12:40:23 %S A345349 1,1,3,16,137,1716,29767,689704,20868129,811683280,40112905211, %T A345349 2495678969664,193978310951977,18707104147471936,2224427540682088575, %U A345349 324218245786867111936,57606132897772268960513,12412563223145385150556416,3227770981209698325415487539 %N A345349 Number of connected labeled n-node graphs with no cycles of length less than 5. %C A345349 Equivalently, connected labeled graphs of girth at least 5. %Y A345349 EXP transform of A337685. %Y A345349 A006787 counts isomorphism classes. %K A345349 nonn,hard %O A345349 1,3 %A A345349 _Brendan McKay_, Jun 15 2021