16301164

Appears in sequences

• a(n) = 3*binomial(4*n-1, n-1)/(4*n-1).at n=9A006632
• Number of aperiodic necklaces of n beads of 2 colors, 10 of them black.at n=28A032168
• Number of necklaces with 10 black beads and n-10 white beads.at n=29A032195
• Length of lists created by n substitutions k -> Range[k+1,1,-3] starting with {1}, counting down from k+1 to 1 step -3.at n=28A084080
• a(3n+k) = (k+1)*binomial(4n+k, n)/(3n+k+1), where k is n reduced mod 3.at n=29A124753
• Expansion of g.f. A(x) satisfying A(x) = 1 + x*(3*A(x)^2 + A(-x)^2)/4.at n=19A369082