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 A111239 #8 Apr 27 2024 12:04:19 %S A111239 2,3,5,13,7,53,107,181,11,23,59,151,29,19,233,31,61,197,17,199,41,193, %T A111239 97,109,37,281,47,71,131,79,149,103,241,137,191,239,113,163,43,653, %U A111239 617,853,673,89,937,67,571,599,751,83,101,1103,829,457,499,229 %N A111239 Primes in the order in which they appear in A109890. %C A111239 Smallest missing prime in A109890 for n <= 10^5 is prime(1821) = 15619. - _Michael De Vlieger_, Apr 27 2024 %H A111239 Michael De Vlieger, <a href="/A111239/b111239.txt">Table of n, a(n) for n = 1..113</a> %t A111239 nn = 2^14; c[_] := False; %t A111239 Array[Set[{a[#], c[#]}, {#, True}] &, 2]; %t A111239 s = a[1] + a[2]; v = NextPrime[a[2]]; %t A111239 t = Join[{{2, 2}}, %t A111239 Reap[Monitor[Do[k = SelectFirst[Divisors[s], ! c[#] &]; %t A111239 c[k] = True; s += k; %t A111239 If[PrimeQ[k], Sow[{k, n}]; %t A111239 If[k == v, While[c[v], v = NextPrime[v]]]], {n, 3, nn}], n] ][[-1, 1]] ]; %t A111239 TakeWhile[t, First[#] <= v &][[All, 1]] (* _Michael De Vlieger_, Apr 27 2024 *) %Y A111239 Cf. A109890, A111238, A111240. %K A111239 nonn %O A111239 1,1 %A A111239 _N. J. A. Sloane_, Oct 30 2005