Sum of ceiling(n/per(w)) over all binary words of length n.

Terms

a(0) =2a(1) =6a(2) =14a(3) =30a(4) =60a(5) =118a(6) =236a(7) =460a(8) =914a(9) =1810a(10) =3608a(11) =7158a(12) =14310a(13) =28504a(14) =56978a(15) =113778a(16) =227484a(17) =454534a(18) =909050a(19) =1817232a(20) =3634344a(21) =7267198a(22) =14534120a(23) =29064982a(24) =58129922a(25) =116253394a(26) =232506236a(27) =465000468a(28) =929999880a(29) =1859974762