218349120

Appears in sequences

• Fourth convolution of Catalan numbers: a(n) = 4*binomial(2*n+3,n)/(n+4).at n=15A002057
• a(n) = 8*binomial(2*n+1,n-3)/(n+5).at n=13A003518
• An inverse Chebyshev transform of x^3.at n=16A099376
• Arises from enumeration of a certain class of partial zig-zag knight's paths on the square grid.at n=32A368378
• Arises from enumeration of a certain class of partial zig-zag knight's paths on the square grid.at n=32A368380