42508

Appears in sequences

• Number of walks on cubic lattice starting and finishing on the xy plane and never going below it.at n=7A005572
• 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=8A025228
• Numbers k such that k-th and (k+1)-st term of A038593 differ by 3.at n=29A038634
• Triangle of numbers arising in enumeration of walks on cubic lattice.at n=28A052179
• E.g.f.: Sum_{n>=0} x^n * (1 + x^n)^n * exp(3*x^(n+1)) / n!.at n=7A259203
• Number of length-n binary words w such that ww is rich.at n=21A306314