A119808
Sequences linked to this entry ?
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A119808: Triangle read by rows: T(n,k) is the number of ternary words of length n having k runs of consecutive 0's (0<=k<=ceiling(n/2)).
identification, match triangle
1 · 2, 1 · 4, 5 · 8, 17, 2 … Σ 1, 3, 9, 27, 81, 243, 729, 2187, …