Partial sums of A130707.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =11a(5) =21a(6) =43a(7) =87a(8) =173a(9) =343a(10) =683a(11) =1365a(12) =2731a(13) =5463a(14) =10925a(15) =21847a(16) =43691a(17) =87381a(18) =174763a(19) =349527a(20) =699053a(21) =1398103a(22) =2796203a(23) =5592405a(24) =11184811a(25) =22369623a(26) =44739245a(27) =89478487a(28) =178956971a(29) =357913941