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 A338048 #10 Oct 08 2020 20:05:52 %S A338048 2,2,4,5,11,6,7,9,13,12,11,12,19,16,19,17,17,18,20,21,23,30,24,26,32, %T A338048 34,27,30,29,36,37,36,35,36,35,41,37,40,43,41,43,42,43,45,47,50,48,48, %U A338048 51,52,51,57,53,54,55,57,59,60,61,60,63,76,64,65,65,66,75 %N A338048 a(n) is the smallest number that is not less than n such that n*a(n)+2 is semiprime. %C A338048 Motivated by a question about arranging square tiles in a rectangle. %Y A338048 Cf. A001358, A338049. %K A338048 nonn %O A338048 1,1 %A A338048 _N. J. A. Sloane_, Oct 08 2020, based on an email from _Todor Szimeonov_, Oct 07 2020