1353769

Appears in sequences

• G.f.: 1/(1-2x-15x^2)^(1/2); also, a(n) is the central coefficient of (1+x+4x^2)^n.at n=10A084605
• Triangle read by rows: T(n,k) = number of colored weighted Motzkin paths ending at (n,k).at n=55A293171