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 A049042 #6 Jun 28 2020 14:25:00 %S A049042 2,5,7,11,17,19,23,31,37,41,61,71,73,89,103,113,131,139,157,163,167, %T A049042 173,191,193,197,211,227,233,239,251,257,263,283,293,307,313,317,331, %U A049042 337,349,367,373,379,383,397,401,409,419,431,457,461,463,467,487,491 %N A049042 Domain of A049041. %F A049042 Primes that divide some positive element of A003422. %Y A049042 Cf. A049041, A003422. %K A049042 nonn %O A049042 1,1 %A A049042 _David W. Wilson_