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 A145489 #16 Jan 25 2017 20:06:40 %S A145489 0,1,2,3,7,8,12,16,21,23,26,37,38,42,43,47,51,56,58,63,68,73,78,91,92, %T A145489 98,101,106,107,108,133,136,141,142,156,157,162,173,192,196,201,203, %U A145489 212,218,227,233,236,238,246,247,257,267,268,271,287,296,306,313,316,323,327,332,346,353,357,366,367,371,376,387,401,406,411,423,441,442,448,453,471,472,478,483,488,491,498 %N A145489 Numbers k such that 6k + 11 is prime and 12k + 5 is also prime. %H A145489 Ivan Neretin, <a href="/A145489/b145489.txt">Table of n, a(n) for n = 1..10000</a> %F A145489 a(n) = (A145475(n) - 5)/12. %t A145489 Select[Range[0,500], PrimeQ[6# + 11 ] && PrimeQ[12# + 5]&] %o A145489 (PARI) isok(n) = isprime(6*n+11) && isprime(12*n+5); \\ _Michel Marcus_, Jan 24 2017 %Y A145489 Cf. A063908-A063913, A092109, A145471-A145490. %K A145489 nonn %O A145489 1,3 %A A145489 _Artur Jasinski_, Oct 11 2008 %E A145489 Corrected by _Artur Jasinski_, Apr 01 2011