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 A051651 #21 Feb 24 2025 02:03:20 %S A051651 150151,330331,390391,870871,930931,1231231,1411411,1831831,2012011, %T A051651 2372371,2672671,3813811,4174171,4474471,5375371,5435431,5735731, %U A051651 5915911,8078071,9219211,10120111,10420411,11021011,11501491,12642631,14024011,14624611,16246231,16426411 %N A051651 Primes of the form 30030*p + 1 where p is a prime. %C A051651 Generalization of A005385; can be called 30030-safe primes. %C A051651 A002110(6)*p + 1 = 30030*p + 1 (prime). %H A051651 Amiram Eldar, <a href="/A051651/b051651.txt">Table of n, a(n) for n = 1..10000</a> %F A051651 a(n) = 30030 * A051654(n) + 1. - _Amiram Eldar_, Feb 24 2025 %e A051651 390391 is a term because 390391 = 2*3*5*7*11*13*p + 1 is prime, where p = 13. %t A051651 Select[30030Prime[Range[100]]+1,PrimeQ] (* _Harvey P. Dale_, Dec 09 2010 *) %o A051651 (PARI) isok(k) = isprime(k) && k % 30030 == 1 && isprime((k-1)/30030); \\ _Amiram Eldar_, Feb 24 2025 %Y A051651 Cf. A002110, A005384, A005385, A007693, A051654. %K A051651 nonn %O A051651 1,1 %A A051651 _Labos Elemer_