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 A271817 #14 Apr 15 2016 16:20:01
%S A271817 2,7,32,41,239,13982,240761,240761,26220368,93499279
%N A271817 Smallest k > 1 such that none of k^2 + 0, k^2 + 1, k^2 + 2,..., k^2 + n are squarefree.
%C A271817 a(10) > 1.2*10^8. - _Giovanni Resta_, Apr 15 2016
%e A271817 a(0) = 2 because 2 > 1 and none of 2^2 + 0 = 4 = 2^2 is squarefree,
%e A271817 a(1) = 7 because none of 7^2 + 0 = 49 = (7^2), 7^2 + 1 = 50 =(5^2)*2 are squarefree,
%e A271817 a(2) = 32 because none of 32^2 + 0 = 1024 = (2^2)*156, 32^2 + 1 = 1025 = (5^2)*41, 32^2 + 2 = 1026 = (3^2)*114 are squarefree.
%o A271817 (PARI) isok(k, n) = {for (j=0, n, if (issquarefree(k^2+j), return (0));); 1;}
%o A271817 a(n) = {my(k = 2); while (! isok(k, n), k++); k;} \\ _Michel Marcus_, Apr 14 2016
%Y A271817 Cf. A013929, A045882, A270442.
%K A271817 nonn,more
%O A271817 0,1
%A A271817 _Juri-Stepan Gerasimov_, Apr 14 2016
%E A271817 a(8)-a(9) from _Giovanni Resta_, Apr 15 2016