n-th index k such that p(k) + p(k+9) = p(k+3) + p(k+6).

Terms

a(0) =6a(1) =7a(2) =9a(3) =11a(4) =13a(5) =33a(6) =34a(7) =35a(8) =36a(9) =68a(10) =70a(11) =71a(12) =76a(13) =81a(14) =95a(15) =100a(16) =102a(17) =103a(18) =149a(19) =160a(20) =184a(21) =215a(22) =254a(23) =273a(24) =277a(25) =299a(26) =346a(27) =350a(28) =355a(29) =364