251595969

Appears in sequences

• Central Delannoy numbers: a(n) = Sum_{k=0..n} C(n,k)*C(n+k,k).at n=12A001850
• a(n) = T([n/2],[(n+1)/2]), where T = Delannoy triangle (A008288).at n=24A026003
• Expansion of (1 + x)^12 / (1 - x)^13.at n=12A053805