Primes which have the same (base 10) digital sum A007953 as the next smaller and next larger prime.

Terms

a(0) =22229a(1) =25391a(2) =69557a(3) =107563a(4) =111409a(5) =167953a(6) =200843a(7) =202309a(8) =208609a(9) =217271a(10) =221891a(11) =236609a(12) =238591a(13) =250091a(14) =250343a(15) =274609a(16) =290557a(17) =355591a(18) =373091a(19) =382391a(20) =404291a(21) =407119a(22) =415409a(23) =417419a(24) =439063a(25) =441229a(26) =447943a(27) =515191a(28) =542873a(29) =581891