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 A102157 #14 Dec 16 2021 19:20:08
%S A102157 2,7,13,87517,2891668030768721,70625274624238913,
%T A102157 103865292721379353050549556815505213549,
%U A102157 8541928234907492663056090579782886424256601
%N A102157 Iccanobirt primes (7 of 15): Prime numbers in A102117.
%C A102157 Next term is too large to include.
%C A102157 The next term has 231 digits. - _Harvey P. Dale_, Dec 16 2021
%F A102157 a(n) = A102117(A102137(n)).
%t A102157 nxt[{a_,b_,c_}]:={b,c,Total[IntegerReverse/@{a,b,c}]};Select[NestList[nxt,{0,0,1},200][[All,1]],PrimeQ] (* _Harvey P. Dale_, Dec 16 2021 *)
%Y A102157 Cf. A000040, A102117, A102151-A102165.
%K A102157 nonn,base,less
%O A102157 1,1
%A A102157 _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004
%E A102157 Offset changed to 1 by _Jinyuan Wang_, Aug 12 2021