Partial sums of A094837.

Terms

a(0) =1a(1) =3a(2) =7a(3) =17a(4) =41a(5) =87a(6) =187a(7) =412a(8) =937a(9) =2162a(10) =5298a(11) =12354a(12) =29994a(13) =74094a(14) =182994a(15) =444354a(16) =1081419a(17) =2737788a(18) =6745792a(19) =16765802a(20) =41815827a(21) =105943891a(22) =261683475a(23) =655537299a(24) =1668304275