819819

Appears in sequences

• a(n) = binomial(3*n,n)^2/(2*n+1).at n=5A188681
• G.f.: A(x) = Sum_{n>=0} x^n * (1+x)^A038722(n), where A038722(n) = floor(sqrt(2*n)+1/2)^2 - n + 1.at n=27A192316
• Triangle T(n,k), read by rows, giving the numerator of the coefficient of x^k in the Boros-Moll polynomial P_n(x) for n >= 0 and 0 <= k <=n.at n=42A223549
• Smallest number having exactly n divisors ending with 3 or 7.at n=25A331082