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 A338049 #13 Oct 09 2020 14:45:48 %S A338049 2,11,11,7,11,19,17,29,29,29,37,37,43,43,61,53,61,71,89,79,73,79,83, %T A338049 103,97,103,107,109,113,127,131,151,137,151,157,197,167,167,173,181, %U A338049 211,199,191,197,199,211,227,257,257,241,233,251,257,251,263,263,269 %N A338049 a(n) is the smallest prime that is not less than prime(n) and is such that prime(n)*a(n)+2 is semiprime. %C A338049 Motivated by a question about arranging square tiles in a rectangle. %Y A338049 Cf. A000040, A001358, A092207, A198327, A338048. %K A338049 nonn %O A338049 1,1 %A A338049 _N. J. A. Sloane_, Oct 08 2020, based on an email from _Todor Szimeonov_, Oct 07 2020