One-half of the number of closed binary words of length n that are not privileged.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =2a(6) =6a(7) =10a(8) =21a(9) =38a(10) =72a(11) =128a(12) =244a(13) =446a(14) =836a(15) =1546a(16) =2899a(17) =5428a(18) =10256a(19) =19326a(20) =36672a(21) =69606a(22) =132656a(23) =253232a(24) =484776a(25) =929392a(26) =1785684a(27) =3435846a(28) =6622020a(29) =12779444