Number of length n binary words that contain at least one pair of consecutive 0's followed by (at some point in the word) at least one pair of consecutive 1's.

A235996

Number of length n binary words that contain at least one pair of consecutive 0's followed by (at some point in the word) at least one pair of consecutive 1's.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =4a(6) =13a(7) =36a(8) =92a(9) =222a(10) =515a(11) =1160a(12) =2555a(13) =5530a(14) =11804a(15) =24916a(16) =52117a(17) =108204a(18) =223273a(19) =458368a(20) =937020a(21) =1908730a(22) =3876615a(23) =7853840a(24) =15878391a(25) =32045814a(26) =64580028a(27) =129983856a(28) =261354937a(29) =525042292

External references