Multiply a(n-1) by 2 and drop all 0's.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =128a(8) =256a(9) =512a(10) =124a(11) =248a(12) =496a(13) =992a(14) =1984a(15) =3968a(16) =7936a(17) =15872a(18) =31744a(19) =63488a(20) =126976a(21) =253952a(22) =5794a(23) =11588a(24) =23176a(25) =46352a(26) =9274a(27) =18548a(28) =3796a(29) =7592