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 A180703 #7 Oct 05 2019 04:53:39 %S A180703 1,20822964865671168,324,4130428534112329328517709824,5832,612220032, %T A180703 708235345355337676357632,819308872942260126404286866009182175232, %U A180703 9028751479390699717312017900815782025058563653632,104976,11019960576 %N A180703 Smallest power of 18 that begins with n. %Y A180703 Cf. A001027, A180701, A180704, A180705. %K A180703 nonn,base %O A180703 1,2 %A A180703 _Daniel Mondot_, Sep 18 2010