A081808
Sequences linked to this entry ?
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A147644: Triangle read by rows: T(n, k) = binomial(n, k) if n < 3, otherwise T(n, k) = binomial(n, k) + 2*binomial(n-2, k-1).
match row sums
1 · 1, 1 · 1, 2, 1 · 1, 5, 5, 1 … Σ 1, 2, 4, 12, 24, 48, 96, 192, …