a(n) = A017911(n+1) = round(sqrt(2)^(n+1)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =6a(5) =8a(6) =11a(7) =16a(8) =23a(9) =32a(10) =45a(11) =64a(12) =91a(13) =128a(14) =181a(15) =256a(16) =362a(17) =512a(18) =724a(19) =1024a(20) =1448a(21) =2048a(22) =2896a(23) =4096a(24) =5793a(25) =8192a(26) =11585a(27) =16384a(28) =23170a(29) =32768