First differences of A182028.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =9a(5) =19a(6) =37a(7) =74a(8) =149a(9) =297a(10) =594a(11) =1189a(12) =2377a(13) =4755a(14) =9509a(15) =19018a(16) =38037a(17) =76073a(18) =152147a(19) =304293a(20) =608586a(21) =1217173a(22) =2434345a(23) =4868690a(24) =9737381a(25) =19474761a(26) =38949523a(27) =77899045a(28) =155798090a(29) =311596181