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 A175463 #12 Sep 08 2022 08:45:51 %S A175463 2,8,9,10,11,16,17,25,26,27,29,31,37,38,42,45,47,51,54,55,56,58,60,61, %T A175463 62,64,66,70,71,72,73,74,78,83,85,89,93,97,98,101,108,111,112,114,116, %U A175463 118,120,121,123,129,134,137,141,142,143,144,145,148,150,156,157,160 %N A175463 Numbers k such that 8*k + 5 is semiprime. %F A175463 a(n) = (A175461(n) - 5)/8. %t A175463 Select[Range[200],PrimeOmega[8#+5]==2&] (* _Harvey P. Dale_, Aug 07 2011 *) %o A175463 (Magma) IsSemiprime:=func< n | &+[ k[2]: k in Factorization(n) ] eq 2 >; [ n: n in [2..200] | IsSemiprime(8*n+5) ]; // _Vincenzo Librandi_, Dec 13 2010 %Y A175463 Cf. A175461 Semiprimes of form 8*n+5. %K A175463 nonn %O A175463 1,1 %A A175463 _Zak Seidov_, May 24 2010