81880920

Appears in sequences

• Expansion of (1-4*x)^(3/2) in powers of x.at n=19A002421
• Number of distinct perforation patterns for deriving (v,b) = (n+3,n) punctured convolutional codes from (2,1).at n=13A007224
• a(n) = lcm(1,2,...,2*n) / (n*binomial(2*n, n)).at n=33A068553