Number of nonzero terms in A117943 up to index 2^n: a(n) = Sum_{k=1..2^n} A117943(k).

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =5a(5) =9a(6) =19a(7) =41a(8) =84a(9) =163a(10) =311a(11) =615a(12) =1268a(13) =2612a(14) =5228a(15) =10244a(16) =20172a(17) =40496a(18) =82066a(19) =165284a(20) =329388a(21) =654207a(22) =1305709a(23) =2620890a(24) =5262399a(25) =10524162a(26) =20983533a(27) =41878200a(28) =83848212a(29) =168188942