Number of binary strings of length n with no substrings equal to 0001 0011 or 1011.

Terms

a(0) =13a(1) =21a(2) =32a(3) =47a(4) =68a(5) =96a(6) =134a(7) =185a(8) =253a(9) =344a(10) =465a(11) =626a(12) =840a(13) =1124a(14) =1501a(15) =2001a(16) =2664a(17) =3543a(18) =4708a(19) =6252a(20) =8298a(21) =11009a(22) =14601a(23) =19360a(24) =25665a(25) =34018a(26) =45084a(27) =59744a(28) =79165a(29) =104893