n-th index k such that p(k) + p(k+4) = p(k+1) + p(k+3).

Terms

a(0) =2a(1) =7a(2) =10a(3) =15a(4) =17a(5) =18a(6) =19a(7) =22a(8) =36a(9) =37a(10) =49a(11) =51a(12) =55a(13) =57a(14) =71a(15) =73a(16) =75a(17) =85a(18) =90a(19) =100a(20) =102a(21) =105a(22) =107a(23) =108a(24) =113a(25) =130a(26) =131a(27) =132a(28) =138a(29) =161