Position of first occurrence of n in A340300.

Terms

a(0) =1a(1) =2a(2) =5a(3) =4a(4) =11a(5) =16a(6) =31a(7) =93a(8) =109a(9) =277a(10) =541a(11) =829a(12) =1621a(13) =2971a(14) =4861a(15) =14583a(16) =26737a(17) =67129a(18) =80209a(19) =240627a(20) =481246a(21) =721891a(22) =2165673a(23) =2165671a(24) =6497013