Index of n-th 2 in A022300.

Terms

a(0) =3a(1) =5a(2) =8a(3) =11a(4) =13a(5) =14a(6) =16a(7) =19a(8) =22a(9) =23a(10) =25a(11) =26a(12) =28a(13) =31a(14) =33a(15) =34a(16) =37a(17) =40a(18) =41a(19) =43a(20) =44a(21) =46a(22) =49a(23) =52a(24) =53a(25) =55a(26) =58a(27) =60a(28) =61a(29) =64