18404100

Appears in sequences

• a(n) = (2*n)!^2 / ((n+1)!*n!^3).at n=8A000888
• Products of members of groups in A076031.at n=4A076029
• Duplicate of A000888.at n=8A151392
• Numbers having exactly five non-unitary prime factors.at n=7A338542
• Triangle read by rows: T(n, k) = binomial(2*k, k) * binomial(2*n, n) / (n + 1).at n=44A379100