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 A249718 #4 Nov 05 2014 11:22:19 %S A249718 1,1,1,1,2,1,2,1,2,3,3,1,2,3,2,3,2,2,3,3,2,3,2,1,2,5,5,3,2,3,2,3,2,2, %T A249718 2,2,3,3,2,3,2,2,2,3,2,3,3,3,2,7,5,5,2,5,3,3,2,2,2,3,2,2,2,3,2,2,2,2, %U A249718 2,2,2,2,3,3,2,5,2,5,2,3,2,3,3,3,2,3,2,3,2,2,3,3,2,3,2,3,2,2,7,3,5,5,5,5,2,2,2,5,3,3,3,3,2,2,2,2,2,3,3,3,2 %N A249718 The largest prime whose square divides the first nonsquarefree number on row n of Pascal's triangle, 1 if all terms on that row are squarefree. %F A249718 a(n) = A249740(A249716(n)). %o A249718 (Scheme) (define (A249718 n) (A249740 (A249716 n))) %Y A249718 Cf. A249716, A249740. %Y A249718 Differs from A249717 for the first time at n=36, where a(36) = 3, while A249717(36) = 2. %K A249718 nonn %O A249718 0,5 %A A249718 _Antti Karttunen_, Nov 04 2014