a(n) = A145812(2n-1).

Terms

a(0) =1a(1) =9a(2) =33a(3) =41a(4) =129a(5) =137a(6) =161a(7) =169a(8) =513a(9) =521a(10) =545a(11) =553a(12) =641a(13) =649a(14) =673a(15) =681a(16) =2049a(17) =2057a(18) =2081a(19) =2089a(20) =2177a(21) =2185a(22) =2209a(23) =2217a(24) =2561a(25) =2569a(26) =2593a(27) =2601a(28) =2689a(29) =2697