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 A332951 #12 Mar 09 2020 22:08:57 %S A332951 2,6,10,14,15,21,22,26,33,34,35,38,39,51,55,57,62,65,69,77,82,85,86, %T A332951 87,91,93,95,111,115,119,123,129,133,141,143,145,146,155,159,161,177, %U A332951 178,183,185,187,201,203,205,209,213,215,217,218,219,221,226,235,237,247 %N A332951 Numbers m such that A245486(k) = m for some k. %C A332951 Also the union of 2 and squarefree semiprimes which never occur in A332952. See A245486 for more information. %H A332951 Romanian Master in Mathematics Contest, Bucharest, 2020, <a href="https://artofproblemsolving.com/community/c6h2019180">Problem 6</a> %e A332951 218 = 2*109 is in the sequence because A245486(262144) = 218. %Y A332951 Cf. A000040, A006530, A006881, A014664, A245486, A332952. %K A332951 nonn %O A332951 1,1 %A A332951 _Jinyuan Wang_, Mar 04 2020