Position of n-th 2 in A020906.

Terms

a(0) =2a(1) =5a(2) =9a(3) =11a(4) =14a(5) =17a(6) =20a(7) =24a(8) =27a(9) =32a(10) =35a(11) =37a(12) =41a(13) =44a(14) =47a(15) =51a(16) =54a(17) =56a(18) =58a(19) =62a(20) =65a(21) =68a(22) =70a(23) =74a(24) =77a(25) =81a(26) =83a(27) =87a(28) =90a(29) =92