3317445

Appears in sequences

• a(n) = Sum_{k=0..n-1} binomial(n,k+1) * binomial(n+k,k).at n=10A002002
• Crystal ball sequence for 9-dimensional cubic lattice.at n=10A008419
• Crystal ball sequence for 10-dimensional cubic lattice.at n=9A008421
• a(n) = T([n/2],[(n+1)/2]), where T = Delannoy triangle (A008288).at n=19A026003
• Expansion of ((1-x)/(1-2x))^10.at n=10A169797
• a(n) = Hypergeometric([-n, n], [1], 2).at n=10A182626