Numbers n such that 2*n + {3, 5, 9, 11} are all primes.

Terms

a(0) =1a(1) =4a(2) =49a(3) =94a(4) =409a(5) =739a(6) =934a(7) =1039a(8) =1624a(9) =1729a(10) =2824a(11) =4714a(12) =6499a(13) =7819a(14) =7864a(15) =8029a(16) =9019a(17) =9454a(18) =9709a(19) =10504a(20) =11134a(21) =12649a(22) =15859a(23) =17419a(24) =21889a(25) =25669a(26) =27664a(27) =31489a(28) =33604a(29) =34744