Difference between n-th lucky number and n-th prime number.

Terms

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