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 A111137 #5 Dec 03 2024 11:41:11 %S A111137 3,31,311,3113197,3113197331 %N A111137 Concatenation of digits of A056129(n), starting from the first 3, that form primes. %C A111137 The next term has 279 digits and is too large to include here. %e A111137 A056129: 1,2,6,3,1,1,3,1,9,7,3,3,1 ........ %e A111137 3 is prime %e A111137 31 is prime %e A111137 311 is prime %e A111137 3113197 is prime %e A111137 3113197331 is prime %e A111137 Next one has 279 digits %Y A111137 Subsequence of A030096. %K A111137 nonn,base %O A111137 1,1 %A A111137 _Pierre CAMI_, Nov 21 2005