Triangle read by rows: T(n,k) is the number of binary sequences of length n containing k subsequences 0011 (n,k>=0).
A118884
Triangle read by rows: T(n,k) is the number of binary sequences of length n containing k subsequences 0011 (n,k>=0).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =8a(4) =15a(5) =1a(6) =28a(7) =4a(8) =52a(9) =12a(10) =96a(11) =32a(12) =177a(13) =78a(14) =1a(15) =326a(16) =180a(17) =6a(18) =600a(19) =400a(20) =24a(21) =1104a(22) =864a(23) =80a(24) =2031a(25) =1827a(26) =237a(27) =1a(28) =3736a(29) =3800
External references
- oeis: A118884