Integers k such that (2^k + 1) + (3^k + 1) + (5^k + 1) is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =10a(5) =15a(6) =30a(7) =34a(8) =35a(9) =46a(10) =55a(11) =62a(12) =83a(13) =230a(14) =1675a(15) =2551a(16) =3934a(17) =25101a(18) =28703a(19) =46295a(20) =54363a(21) =72846