A006012
Sequences linked to this entry ?
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A201730: Triangle T(n,k), read by rows, given by (2,1/2,3/2,0,0,0,0,0,0,0,...) DELTA (0,1/2,-1/2,0,0,0,0,0,0,0,...) where DELTA is the operator defined in A084…
match row sums
1 · 2 · 5, 1 · 14, 6 … Σ 1, 2, 6, 20, 68, 232, 792, 2704, …