A146986
Sequences linked to this entry ?
-
A146986: Triangle, read by rows, T(n, k) = binomial(n, k) for n < 2 and binomial(n, k) + 2^(n-1) * binomial(n-2, k-1) otherwise.
identification, match reversed triangle, match triangle
1 · 1, 1 · 1, 4, 1 · 1, 7, 7, 1 … Σ 1, 2, 6, 16, 48, 160, 576, 2176, …