A007318 * [1, 2, 2, 3, 2, 3, 2, 3, 2, ...].

Terms

a(0) =1a(1) =3a(2) =7a(3) =16a(4) =35a(5) =74a(6) =153a(7) =312a(8) =631a(9) =1270a(10) =2549a(11) =5108a(12) =10227a(13) =20466a(14) =40945a(15) =81904a(16) =163823a(17) =327662a(18) =655341a(19) =1310700a(20) =2621419a(21) =5242858a(22) =10485737a(23) =20971496a(24) =41943015a(25) =83886054a(26) =167772133a(27) =335544292a(28) =671088611a(29) =1342177250