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 A026448 #8 Mar 06 2016 04:34:17
%S A026448 1,2,5,8,9,13,14,17,21,22,25,26,29,32,33,37,38,41,45,48,49,53,56,57,
%T A026448 61,62,65,69,70,73,77,80,81,85,86,89,90,93,94,97,101,102,105,109,110,
%U A026448 113,117,118,121,122,125,129,130,133,134,137,141
%N A026448 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for i<=1<=j<=n.
%H A026448 Ivan Neretin, <a href="/A026448/b026448.txt">Table of n, a(n) for n = 1..1000</a>
%t A026448 a = {1, 2}; 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 A026448 Cf. A026443 and references therein.
%K A026448 nonn
%O A026448 1,2
%A A026448 _Clark Kimberling_