Lesser prime in pair prime(k) +/- k for some k.

Terms

a(0) =3a(1) =7a(2) =43a(3) =139a(4) =251a(5) =683a(6) =1549a(7) =2273a(8) =2393a(9) =2731a(10) =3217a(11) =3529a(12) =3943a(13) =4339a(14) =4723a(15) =4799a(16) =4909a(17) =5531a(18) =5801a(19) =7907a(20) =9421a(21) =10009a(22) =11549a(23) =12263a(24) =12791a(25) =13441a(26) =14011a(27) =14683a(28) =15559a(29) =18089