Indices of prime companion Pell numbers, divided by 2 (A001333).

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =8a(6) =16a(7) =19a(8) =29a(9) =47a(10) =59a(11) =163a(12) =257a(13) =421a(14) =937a(15) =947a(16) =1493a(17) =1901a(18) =6689a(19) =8087a(20) =9679a(21) =28753a(22) =79043a(23) =129127a(24) =145969a(25) =165799a(26) =168677a(27) =170413a(28) =172243a(29) =278321