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 A168047 #10 May 17 2024 03:28:33
%S A168047 1,2,3,4,12,25,30,470,1224,57843,145122,16805481,5285171382
%N A168047 Numbers k that divide the k-th isolated number.
%F A168047 {k: k | A167706(k)}.
%o A168047 (PARI) lista(pmax) = {my(p1 = 2, p2 = 3, c = 1); print1(c, ", "); forprime(p3 = 5, pmax, if(p2 == p1 + 2, c++; if(!((p1+1)%c), print1(c, ", "))); if(p2 != p1 + 2 && p2 != p3 - 2, c++); p1 = p2; p2 = p3);} \\ _Amiram Eldar_, May 17 2024
%Y A168047 Cf. A167706.
%K A168047 nonn,more
%O A168047 1,2
%A A168047 _Juri-Stepan Gerasimov_, Nov 17 2009
%E A168047 Definition and a(6), a(7) corrected; 4 terms added - _R. J. Mathar_, Jun 04 2010
%E A168047 a(12)-a(13) from _Amiram Eldar_, May 17 2024