Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2}, having k isolated 0's (n >= 0, k >= 0).
A120924
Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2}, having k isolated 0's (n >= 0, k >= 0).
Terms
- a(0) =1a(1) =2a(2) =1a(3) =5a(4) =4a(5) =13a(6) =12a(7) =2a(8) =33a(9) =36a(10) =12a(11) =83a(12) =108a(13) =48a(14) =4a(15) =209a(16) =316a(17) =172a(18) =32a(19) =527a(20) =904a(21) =588a(22) =160a(23) =8a(24) =1329a(25) =2548a(26) =1932a(27) =672a(28) =80a(29) =3351
External references
- oeis: A120924