21168000

Appears in sequences

• Triangle T(n, k) = c(n)/(c(k)*c(n-k)) where c(n) = (n-2)!*(n-1)!*n!*(n+1)!/12 with c(0) = c(1) = 1 and c(2) = 2, read by rows.at n=31A173889
• Triangle T(n, k) = c(n)/(c(k)*c(n-k)) where c(n) = (n-2)!*(n-1)!*n!*(n+1)!/12 with c(0) = c(1) = 1 and c(2) = 2, read by rows.at n=32A173889
• Triangle T(n,k) giving denominator of coefficient of x^k in a polynomial p(n) defined as a determinant.at n=11A233472
• Coreful 4-abundant numbers: numbers k such that csigma(k) > 4*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=4A340110
• Numbers that have a record number of infinitary divisors that are powerful (A001694).at n=16A377709
• Numbers that set records in in A379772.at n=28A379773