Number of palindromic periodicities among the binary words of length n.

Terms

a(0) =2a(1) =4a(2) =8a(3) =16a(4) =32a(5) =58a(6) =108a(7) =190a(8) =336a(9) =560a(10) =948a(11) =1574a(12) =2568a(13) =4116a(14) =6596a(15) =10444a(16) =16320a(17) =25488a(18) =39216a(19) =60690a(20) =92204a(21) =141060a(22) =212104a(23) =322508a(24) =480976a(25) =726290a(26) =1075640a(27) =1616368a(28) =2380444a(29) =3561146