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 A133969 #5 Apr 28 2015 15:01:23
%S A133969 3761,13367,31397,77773,132953,178069,229751,233743,233911,312619,
%T A133969 313613,313739,313829,317741,317903,333857,333923,337397,337457,
%U A133969 337487,337661,337853,337907,352489,357727,359929,364627,370451,373753,374159
%N A133969 Home primes whose homeliness is greater than 7.
%C A133969 Number of terms < 10^n: 0, 0, 0, 1, 4, 64, 606, ....
%t A133969 lst = {}; f[n_] := FromDigits@ Flatten[ IntegerDigits@ Table[ #[[1]], {#[[2]]}] & /@ FactorInteger@n, 2]; h[n_] := NestWhileList[f@# &, n, !PrimeQ@# &, 1, 28]; Do[p = h[n][[ -1]]; If[ PrimeQ@p && p < 10^7 && p != n, Print[{n, p}]; AppendTo[lst, p]], {n, 2, 1000}];
%t A133969 d = 8 - 2; lsu = {}; Do[ If[ lst[[n]] == lst[[n + d]], AppendTo[ lsu, lst[[n]] ]], {n, 188004 - d - 1}]; Take[ Union@ lsu, 31]
%Y A133969 Cf. A037274, A118756, A133957, A133959, A133961, A133963, A133965, A133967, A133971, A133973, A133975, A133977, A133979.
%K A133969 nonn,base
%O A133969 1,1
%A A133969 _Robert G. Wilson v_, Sep 30 2007