Least prime p such that 2n can be written as the sum or absolute difference of p and the next prime, or -1 if no such prime exists.

A363544

Least prime p such that 2n can be written as the sum or absolute difference of p and the next prime, or -1 if no such prime exists.

Terms

    a(0) =-1a(1) =3a(2) =7a(3) =23a(4) =3a(5) =139a(6) =5a(7) =113a(8) =1831a(9) =7a(10) =887a(11) =1129a(12) =11a(13) =2477a(14) =2971a(15) =13a(16) =5591a(17) =1327a(18) =17a(19) =30593a(20) =19333a(21) =19a(22) =15683a(23) =81463a(24) =28229a(25) =31907a(26) =23a(27) =35617a(28) =82073a(29) =44293

External references