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 A338073 #12 Oct 21 2020 12:52:19
%S A338073 1,2,5,4,13,11,7,38,9,22,45,53,10,12,17,44,49,50,52,85,158,68,55,229,
%T A338073 97,8,62,269,256,159,41,73,54,179,581,210,98,297,86,34,43,273,199,122,
%U A338073 16,153,140,29,709,521,64,163,87,389,1145,106,164,231,26,177,28,464,51,258,398,391
%N A338073 Rearrangement of positive integers except 3 defined by A083758.
%C A338073 This is conjectured to be a permutation of all positive integers except 3.
%C A338073 Apply PrimePi (A000720) to the terms of A083758.
%o A338073 (PARI) a338073(m)={my(np=1000*m,pused=vectorsmall(np),digp=[]);for(n=1,m,my(found=0);for(k=1,np, if(!pused[k],my(add=digits(prime(k)),pc=concat(digp,add));if(ispseudoprime(fromdigits(pc)),print1(k,", ");digp=pc;pused[k]=1;found=1;break)));if(!found,break))};
%o A338073 a338073(66) \\ _Hugo Pfoertner_, Oct 21 2020
%Y A338073 Cf. A000720, A083758, A083759, A338072.
%K A338073 nonn
%O A338073 1,2
%A A338073 _N. J. A. Sloane_, Oct 20 2020