Even numbers in A090252 in order of appearance.

Terms

a(0) =2a(1) =4a(2) =8a(3) =16a(4) =26a(5) =32a(6) =64a(7) =128a(8) =206a(9) =256a(10) =478a(11) =512a(12) =998a(13) =1024a(14) =2048a(15) =3134a(16) =4096a(17) =6514a(18) =8192a(19) =13942a(20) =16384a(21) =28894a(22) =32768a(23) =60518a(24) =65536a(25) =126634a(26) =131072a(27) =261398a(28) =262144