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 A133074 #11 Jun 09 2022 13:32:52
%S A133074 2,2337,475367,79838997,113127131157163,167173211223233251,
%T A133074 257263277293307317331,337353359367373379383389,
%U A133074 397401409439443449457467479,487491499503509541547557563577
%N A133074 Concatenation of next n isolated primes.
%H A133074 Harvey P. Dale, <a href="/A133074/b133074.txt">Table of n, a(n) for n = 1..166</a>
%H A133074 Omar E. Pol, <a href="http://www.polprimos.com">Determinacion geometrica de los numeros primos y perfectos</a>.
%t A133074 Module[{ip=Select[Prime[Range[200]],NoneTrue[#+{2,-2},PrimeQ]&],c},c = Floor[ (Sqrt[8 Length[ip]+1]-1)/2];FromDigits[Flatten[IntegerDigits/@#]]&/@TakeList[ ip,Range[c]]] (* _Harvey P. Dale_, Jun 09 2022 *)
%Y A133074 Cf. A007510, A053067, A133013, A133014.
%K A133074 base,easy,nonn
%O A133074 1,1
%A A133074 _Omar E. Pol_, Nov 10 2007