Partial sums of A001523.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =31a(6) =58a(7) =105a(8) =184a(9) =314a(10) =523a(11) =853a(12) =1365a(13) =2149a(14) =3332a(15) =5097a(16) =7701a(17) =11505a(18) =17009a(19) =24907a(20) =36147a(21) =52027a(22) =74304a(23) =105352a(24) =148355a(25) =207575a(26) =288673a(27) =399157a(28) =548926a(29) =750996