Triangle read by rows: T(n,k) is the number of ternary words of length n containing k 012's (n >= 0, 0 <= k <= floor(n/3)).

A119851

Triangle read by rows: T(n,k) is the number of ternary words of length n containing k 012's (n >= 0, 0 <= k <= floor(n/3)).

Terms

    a(0) =1a(1) =3a(2) =9a(3) =26a(4) =1a(5) =75a(6) =6a(7) =216a(8) =27a(9) =622a(10) =106a(11) =1a(12) =1791a(13) =387a(14) =9a(15) =5157a(16) =1350a(17) =54a(18) =14849a(19) =4566a(20) =267a(21) =1a(22) =42756a(23) =15102a(24) =1179a(25) =12a(26) =123111a(27) =49113a(28) =4833a(29) =90

External references