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 A101178 #4 Mar 30 2012 17:29:20 %S A101178 2,6,30,210,6006,67830,690690,35303730,3383531970,29248649430, %T A101178 1846079805570,220495674290430,15231748284963210,328001307608664690, %U A101178 58030069605260142390,4938238739984380540710,182365421703667931839110 %N A101178 Largest squarefree number that divides A101177(n). %C A101178 First differs from A077176 at a(18). %Y A101178 Cf. A101174, A101175, A101176, A101177, A101179. %K A101178 nonn %O A101178 1,1 %A A101178 _Ray Chandler_, Dec 03 2004