A146988
Sequences linked to this entry ?
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A146988: Triangle, read by rows, T(n, k) = binomial(n, k) for n < 2 and binomial(n, k) + 4^(n-1) * binomial(n-2, k-1) otherwise.
identification, match reversed triangle, match triangle
1 · 1, 1 · 1, 6, 1 · 1, 19, 19, 1 … Σ 1, 2, 8, 40, 272, 2080, 16448, 131200, …