Smallest number k such that n + k is prime.

Terms

a(0) =2a(1) =1a(2) =0a(3) =0a(4) =1a(5) =0a(6) =1a(7) =0a(8) =3a(9) =2a(10) =1a(11) =0a(12) =1a(13) =0a(14) =3a(15) =2a(16) =1a(17) =0a(18) =1a(19) =0a(20) =3a(21) =2a(22) =1a(23) =0a(24) =5a(25) =4a(26) =3a(27) =2a(28) =1a(29) =0