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 A238892 #8 Mar 08 2014 12:41:39
%S A238892 0,0,1,1,2,2,2,3,4,0,4,5,2,4,6,6,0,8,0,9,8,9,10,11,4,5,10,0,10,11,2,
%T A238892 10,0,1,16,3,0,4,18,18,4,9,10,18,20,12,18,20,0,0,0,1,16,21,18,10,0,21,
%U A238892 22,23,28,29,30,9,0,1,2,3,32,33,6,35,0,9,32,10,36
%N A238892 Index of last squarefree number in the first half of row n of Pascal's triangle.
%C A238892 The first squarefree binomial coefficient in every row is at position 0. Sequence A048279 lists the rows n for which a(n) = 0.
%H A238892 T. D. Noe, <a href="/A238892/b238892.txt">Table of n, a(n) for n = 0..10000</a>
%t A238892 Table[Position[Binomial[n, Range[0, n/2]], _?(SquareFreeQ[#] &)][[-1,1]] - 1, {n, 0, 100}]
%Y A238892 Cf. A048279 (positions of zeros).
%Y A238892 Cf. A238337 (number of distinct squarefree numbers in row n).
%Y A238892 Cf. A238891 (last squarefree number in the first half of row n).
%K A238892 nonn
%O A238892 0,5
%A A238892 _T. D. Noe_, Mar 06 2014