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 A059324 #22 Jan 08 2017 03:50:32 %S A059324 5,10,12,15,19,20,23,25,26,30,33,34,35,36,40,45,47,49,50,53,54,55,56, %T A059324 60,61,62,65,67,68,70,72,75,78,80,82,85,87,88,89,90,91,95,96,100,101, %U A059324 103,104,105,110,111,114,115,117,118,120,121,122,124,125,127,129,130 %N A059324 Numbers n such that 6n + 5 is composite. %C A059324 Conjecture: There exists no pair of primes (p, q > p^2) such that q - p^2 = 6*n - 4 (see A138479). - Philippe LALLOUET (philip.lallouet(AT)orange.fr), Mar 20 2008 %H A059324 G. C. Greubel, <a href="/A059324/b059324.txt">Table of n, a(n) for n = 1..5000</a> %F A059324 a(n) = A046953(n-1) - 1. %e A059324 a(3) = 12 because 6*12 + 5 = 77 is composite. %t A059324 Select[Range[200],!PrimeQ[6#+5]&] (* _Harvey P. Dale_, Mar 13 2011 *) %o A059324 (PARI) isok(n) = ! isprime(6*n+5); \\ _Michel Marcus_, Jan 06 2017 %Y A059324 Complement of A059325. %Y A059324 Cf. A138479. %K A059324 nonn,easy %O A059324 1,1 %A A059324 _Anton Joha_, Jan 26 2001 %E A059324 More terms from _Henry Bottomley_, Jan 29 2001