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 A252794 #13 Sep 08 2022 08:46:10 %S A252794 1,5,68,85,86,92,136 %N A252794 Numbers m such that 9^m + m is a semiprime. %C A252794 a(8) > 435. - _Carl Schildkraut_, Aug 14 2015 %e A252794 1 is in this sequence because 9^1+1 = 2*5 is semiprime. %e A252794 5 is in this sequence because 9^5+5 = 2*29527 and these two factors are prime. %t A252794 Select[Range[435], PrimeOmega[9^# + #]==2 &] %o A252794 (Magma) IsSemiprime:=func<i | &+[d[2]: d in Factorization(i)] eq 2>; [m: m in [1..435] | IsSemiprime(s) where s is 9^m+m]; %Y A252794 Cf. similar sequences listed in A252788. %Y A252794 Cf. A252662. %K A252794 nonn,more %O A252794 1,2 %A A252794 _Vincenzo Librandi_, Dec 27 2014 %E A252794 a(4)-a(7) from _Carl Schildkraut_, Aug 14 2015