218318

Appears in sequences

• Number of walks on cubic lattice starting and finishing on the xy plane and never going below it.at n=8A005572
• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 3, with initial terms 2,1.at n=9A025228
• Triangle of numbers arising in enumeration of walks on cubic lattice.at n=36A052179