Number of binary vectors with restricted repetitions.

Terms

a(0) =1a(1) =1a(2) =3a(3) =7a(4) =17a(5) =42a(6) =104a(7) =259a(8) =648a(9) =1627a(10) =4098a(11) =10350a(12) =26202a(13) =66471a(14) =168939a(15) =430071a(16) =1096451a(17) =2799072a(18) =7154189a(19) =18305485a(20) =46885179a(21) =120195301a(22) =308393558a(23) =791882862a(24) =2034836222a(25) =5232250537a(26) =13462265079a(27) =34657740889a(28) =89272680921a(29) =230069128392