250806271

Properties

Appears in sequences

• Dot product of the rows of triangle A046899 with vector (1,2,4,8,...) (= A000079).at n=10A178792
• a(n) = Sum_{k=0..floor((n-1)/2)} binomial(n,k)*binomial(n-1-k,floor((n-1)/2) - k).at n=20A359066
• Prime numbersat n=13721011