a(n) is the smallest prime p such that p + 2 is a product of n primes (counted with multiplicity).

A321169

a(n) is the smallest prime p such that p + 2 is a product of n primes (counted with multiplicity).

Terms

    a(0) =3a(1) =2a(2) =43a(3) =79a(4) =241a(5) =727a(6) =3643a(7) =15307a(8) =19681a(9) =164023a(10) =1673053a(11) =885733a(12) =2657203a(13) =18600433a(14) =23914843a(15) =100442347a(16) =358722673a(17) =645700813a(18) =4519905703a(19) =18983603959a(20) =48427561123a(21) =31381059607a(22) =261508830073

External references