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 A282689 #5 Feb 20 2017 23:15:40 %S A282689 25,529,25,529,25,529,25,49,529,25,169,529,361,25,529,25,529,25,49, %T A282689 529,25,529,25,169,25,361,25,529,49,25,529,25,529,25,529,169,25,529, %U A282689 49,25,361,529,25,529,25,529,25,841,169,529,25,25,361,25,529,25,529 %N A282689 The smallest square referenced in A280149 (Numbers n such that 3^n - 2^n is not squarefree). %H A282689 Robert Price, <a href="/A282689/b282689.txt">Table of n, a(n) for n = 1..127</a> %e A282689 A280149(1)=10, 3^10-2^10=58025, 58025=5*5*11*211, so 58025 is not squarefree the square being 5*5=25. %Y A282689 Cf. A280149, A282688. %K A282689 nonn %O A282689 1,1 %A A282689 _Robert Price_, Feb 20 2017