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 A092129 #10 Oct 14 2018 12:46:22
%S A092129 3091,8129,8131,9983,9985,55559,92603,99443,99445,112709,132077,
%T A092129 132079,182749,190937,190939,209479,237449,237451,239089,249689,
%U A092129 296779,300449,313411,401429,401431,441677,441679,452639,452641,547157,604487,604489
%N A092129 Numbers n such that n, n+2, n+4, n+6, n+8, n+10, n+12 are semiprimes.
%C A092129 Semiprimes in arithmetic progression. All terms are odd, see also A056809.
%t A092129 PrimeFactorExponentsAdded[n_] := Plus @@ Flatten[Table[ #[[2]], {1}] & /@ FactorInteger[n]]; Select[ Range[ 631200], PrimeFactorExponentsAdded[ # ] == PrimeFactorExponentsAdded[ # + 2] == PrimeFactorExponentsAdded[ # + 4] == PrimeFactorExponentsAdded[ # + 6] == PrimeFactorExponentsAdded[ # + 8] == PrimeFactorExponentsAdded[ # + 10] == PrimeFactorExponentsAdded[ # + 12] == 2 &] (* _Robert G. Wilson v_, Feb 24 2004 *)
%t A092129 Select[Range[610000],Union[PrimeOmega[#+Range[0,12,2]]]=={2}&] (* _Harvey P. Dale_, Oct 14 2018 *)
%Y A092129 Cf. A056809, A070552, A092125, A092126, A092127, A092128.
%K A092129 easy,nonn
%O A092129 1,1
%A A092129 _Zak Seidov_, Feb 22 2004
%E A092129 More terms from _Don Reble_, Feb 23 2004
%E A092129 More terms from _Robert G. Wilson v_, Feb 24 2004