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 A153041 #26 Sep 08 2022 08:45:39 %S A153041 10,14,17,20,22,23,26,27,29,32,34,35,37,38,41,42,44,47,48,50,52,53,55, %T A153041 56,57,59,62,65,67,68,69,70,71,72,74,76,77,80,81,82,83,86,87,89,90,92, %U A153041 94,95,97,98,101,102,103,104 %N A153041 Numbers n >=10 such that 2*n-19 is not a prime. %C A153041 One more than associated values in A153051, two more than A153047. - _R. J. Mathar_, Jan 05 2011 %C A153041 The terms after a(1) are the values of 2*h*k + k + h + 10, where h and k are positive integers.- _Vincenzo Librandi_, Jan 19 2013 %H A153041 Vincenzo Librandi, <a href="/A153041/b153041.txt">Table of n, a(n) for n = 1..1000</a> %t A153041 Select[Range[10, 200], !PrimeQ[2 # - 19] &] (* _Vincenzo Librandi_, Jan 19 2013 *) %o A153041 (Magma) [n: n in [10..150] | not IsPrime(2*n - 19)]; // _Vincenzo Librandi_, Jan 19 2013 %Y A153041 Cf. A097932, A155704. %Y A153041 Numbers n such that 2n-k is not prime: A104275 (k=1), A153043 (k=3), A153040 (k=5), A153039 (k=7), A153044 (k=9), A153045 (k=11), A153049 (k=13), A153047 (k=15), A153051 (k=17), A153041 (k=19). %Y A153041 Similar sequence listed also in A089559, A153144. %K A153041 nonn,easy %O A153041 1,1 %A A153041 _Vincenzo Librandi_, Dec 17 2008 %E A153041 Edited by _N. J. A. Sloane_, Jun 22 2010