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 A302038 #9 Apr 06 2018 10:16:22 %S A302038 4,6,9,10,14,15,19,22,26,27,31,34,35,39,46,50,55,58,59,63,65,73,74,75, %T A302038 82,86,94,95,99,101,103,106,113,122,133,134,135,142,145,147,154,155, %U A302038 163,166,167,171,178,182,185,187,194,203,205,214,219,230,238,242,243,245,253,254,255,262,263,269,271,279,286,293,298,299,311 %N A302038 Semiludic numbers or "Ludic semiprimes": numbers n for which A302037(n) = 2. %C A302038 An analog for A001358 based on the Ludic factorization (see A302032). %H A302038 Antti Karttunen, <a href="/A302038/b302038.txt">Table of n, a(n) for n = 1..3953</a> %H A302038 <a href="/index/Si#sieve">Index entries for sequences generated by sieves</a> %o A302038 (PARI) k=0; for(n=1,512,if(2==A302037(n),k++;print1(n,","))); \\ Other code as in A302037. %Y A302038 Cf. A003309, A255127, A302032, A302037. %Y A302038 Cf. A254100 (a subsequence). %Y A302038 Cf. also A001358, A302036. %K A302038 nonn %O A302038 1,1 %A A302038 _Antti Karttunen_, Apr 01 2018