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 A090090 #25 Sep 08 2022 08:45:12
%S A090090 14,33,65,119,209,299,493,589,851,1189,1333,1739,2173,2537,2867,3551,
%T A090090 4189,4453,5293,5893,6497,7663,8383,9167,10379,11009,11639,13589,
%U A090090 14279,15481,17653,19519,20687,21823,24287,25217,27161,29177,30227,33043
%N A090090 a(n) = prime(n)*prime(n+3).
%e A090090 a(5) = prime(5)*prime(8) = 11*19 = 209.
%t A090090 Table[ Prime[n] Prime[n + 3], {n, 1, 40}] (* _Robert G. Wilson v_, Jan 22 2004 *)
%t A090090 First[#]*Last[#]&/@Partition[Prime[Range[200]],4,1] (* _Harvey P. Dale_, Dec 18 2011 *)
%o A090090 (Magma) [NthPrime(n)*NthPrime(n+3): n in [1..40]]; // _Vincenzo Librandi_, Feb 03 2020
%Y A090090 Subset of the squarefree semiprimes, A006881.
%Y A090090 Cf. A006094, A090076.
%K A090090 easy,nonn
%O A090090 1,1
%A A090090 _Felix Tubiana_, Jan 21 2004
%E A090090 Extended by _Robert G. Wilson v_, Jan 22 2004