Duplicate of A211694.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =11a(8) =23a(9) =47a(10) =103a(11) =226a(12) =518a(13) =1200a(14) =2867a(15) =6946a(16) =17234a(17) =43393a(18) =111419a(19) =290242a(20) =768901a(21) =2065172a(22) =5630083a(23) =15549403a(24) =43527487a(25) =123343911a(26) =353864422a(27) =1026935904a(28) =3014535166a(29) =8945274505