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 A155945 #16 Sep 08 2022 08:45:41 %S A155945 3,5,8,10,12,13,18,19,20,21,23,24,26,28,32,33,37,38,39,40,43,47,48,49, %T A155945 52,53,54,55,56,58,61,62,63,65,68,71,73,75,76,78,79,81,82,83,86,87,88, %U A155945 89,90,91,93,96,98,100 %N A155945 Numbers n such that 24*n + 13 is not prime. %H A155945 Vincenzo Librandi, <a href="/A155945/b155945.txt">Table of n, a(n) for n = 1..1000</a> %e A155945 Distribution of the terms in the following triangular array: %e A155945 *; %e A155945 *,*; %e A155945 *,*,*; %e A155945 *,*,*,*; %e A155945 *,*,*,*,*; %e A155945 *,*,*,*,*,*; %e A155945 *,*,*,*,*,*,*; %e A155945 *,3,*,*,*,*,*,*; %e A155945 *,*,5,*,*,*,*,*,*; %e A155945 *,*,*,*,*,*,*,*,*,*; %e A155945 *,*,*,*,10,*,*,*,*,*,*; %e A155945 *,*,*,*,*,13,*,*,*,*,*,*; etc. %e A155945 where * marks the non-integer values of (2*h*k + k + h - 6)/12 with h >= k >= 1. - _Vincenzo Librandi_, Jan 15 2013 %t A155945 Select[Range[0, 100], !PrimeQ[24 # + 13] &] (* _Vincenzo Librandi_, Oct 15 2012 *) %o A155945 (Magma) [n: n in [0..100] |not IsPrime(24*n + 13)]; // _Vincenzo Librandi_, Oct 15 2012 %Y A155945 Cf. A139529, A139530. %K A155945 nonn,easy %O A155945 1,1 %A A155945 _Vincenzo Librandi_, Jan 31 2009