Numbers k such that prime(k) + prime(k+3) = prime(k+1) + prime(k+2).

Terms

a(0) =3a(1) =4a(2) =5a(3) =6a(4) =9a(5) =12a(6) =16a(7) =21a(8) =25a(9) =26a(10) =27a(11) =29a(12) =33a(13) =37a(14) =41a(15) =43a(16) =48a(17) =54a(18) =56a(19) =63a(20) =71a(21) =74a(22) =77a(23) =80a(24) =81a(25) =84a(26) =88a(27) =92a(28) =93a(29) =100