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 A283092 #26 Mar 06 2017 19:39:58 %S A283092 9,49,9,9,9,9,9,49,121,9,9,961,9,9,9,9,49,9,529,9,49,9,961,9,9,9,49,9, %T A283092 9,49,9,9,9,9,961,9,49,529,9,9,9,9,9,1849,9,49,9,9,49,9,9,9,9,529,9, %U A283092 121,49,9,9,9 %N A283092 The smallest square referenced in A280296 (Squarefree numbers n such that 2^n - 1 is divisible by a square > 1). %e A283092 A280296(1)=6, 2^6-1 = 63 = 3*3*7, so 63 is not squarefree the square being 3*3=9. %Y A283092 Cf. A280296, A283245. %K A283092 nonn %O A283092 1,1 %A A283092 _Robert Price_, Mar 06 2017