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 A026463 #8 Mar 06 2016 11:31:21
%S A026463 2,4,5,7,9,10,11,13,15,17,19,21,22,25,27,29,30,31,35,37,39,41,44,45,
%T A026463 46,49,51,54,55,57,59,62,64,65,67,69,70,71,77,78,81,84,85,87,91,92,94,
%U A026463 95,99,101,102,104,105,107,109,110,111,113,120
%N A026463 a(n) = least positive integer > a(n-1) and not a(i)*a(j)-2 for 1<=i<=j<=n, n >= 2.
%H A026463 Ivan Neretin, <a href="/A026463/b026463.txt">Table of n, a(n) for n = 1..1000</a>
%t A026463 a = {2, 4}; 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 A026463 Cf. A026453 and references therein.
%K A026463 nonn
%O A026463 1,1
%A A026463 _Clark Kimberling_