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 A026460 #8 Mar 06 2016 10:22:14
%S A026460 1,3,4,5,6,8,9,11,12,15,17,19,20,21,24,26,27,29,32,33,35,36,37,39,40,
%T A026460 41,44,45,47,48,50,51,54,56,57,59,60,63,65,67,68,69,71,72,75,77,80,81,
%U A026460 84,87,89,90,91,92,95,96,99,101,104,105
%N A026460 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-2 for 1<=i<=j<=n, n >= 2.
%H A026460 Ivan Neretin, <a href="/A026460/b026460.txt">Table of n, a(n) for n = 1..1000</a>
%t A026460 a = {1, 3}; used = {a[[1]]^2 - 2, a[[1]]*a[[2]] - 2, a[[2]]^2 - 2}; Do[k = a[[-1]] + 1; While[MemberQ[used, k], k++]; AppendTo[a, k]; used = Union[used, k*a - 2], {n, 3, 60}]; a (* _Ivan Neretin_, Mar 06 2016 *)
%Y A026460 Cf. A026453 and references therein.
%K A026460 nonn
%O A026460 1,2
%A A026460 _Clark Kimberling_