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 A102200 #14 Nov 17 2024 11:35:47
%S A102200 4,53122,412441,2360934421,2982905123,1968515515,8282454457,
%T A102200 17281502461,88998294238681,858342429826762,2350396241873433799,
%U A102200 25572406084465911331237801,52170015710352407496920694341,798986767053692909522422712521,718154384550161644441959876349
%N A102200 Iccanobirt semiprimes (10 of 15): Semiprime numbers in A102120.
%F A102200 a(n) = A102120(A102180(n)).
%t A102200 nxt[{a_,b_,c_}]:={b,c,IntegerReverse[c+IntegerReverse[b]+a]};Select[NestList[nxt,{0,0,1},100][[All,1]],PrimeOmega[#]==2&] (* _Harvey P. Dale_, Nov 17 2024 *)
%Y A102200 Cf. A001358, A102120, A102180, A102191-A102205.
%K A102200 nonn,less,base
%O A102200 1,1
%A A102200 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004
%E A102200 Offset changed to 1 and more terms from _Jinyuan Wang_, Aug 14 2021