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 A153044 #35 Sep 08 2022 08:45:39 %S A153044 5,9,12,15,17,18,21,22,24,27,29,30,32,33,36,37,39,42,43,45,47,48,50, %T A153044 51,52,54,57,60,62,63,64,65,66,67,69,71,72,75,76,77,78,81,82,84,85,87, %U A153044 89,90,92,93,96,97,98,99,102,105,106,107,108,109,111,112,113,114,115,117,120 %N A153044 Numbers n such that 2*n-9 is not a prime. %C A153044 One more than the associated entry in A153039. - _R. J. Mathar_, Jan 05 2011 %C A153044 The terms after a(1) are the values of 2*h*k + k + h + 5, where h and k are positive integers. - _Vincenzo Librandi_, Jan 19 2013 %H A153044 Vincenzo Librandi, <a href="/A153044/b153044.txt">Table of n, a(n) for n = 1..1000</a> %t A153044 Select[Range[150],!PrimeQ[2#-9]&] (* _Harvey P. Dale_, Mar 05 2011 *) %o A153044 (Magma) [n: n in [5..121] | not IsPrime(2*n-9)]; // _Bruno Berselli_, Mar 05 2011 %Y A153044 Cf. A097069, A153039. %K A153044 nonn,easy %O A153044 1,1 %A A153044 _Vincenzo Librandi_, Dec 17 2008 %E A153044 Corrected and extended by _N. J. A. Sloane_, May 29 2010