80405325

Appears in sequences

• T(n,k) = denominator of 2*Pi*Sum_{j=0..n-k-1} ((-1)^j*n*(k + j + 2)*(n + k +j)!*(k + j)!^2)/((n - k - j - 1)!*(2*k + j + 1)!*j!*Gamma(k + j + 3/2)*Gamma(k + j + 5/2)), triangle read by rows (n >= 1, 0 <= k <= n - 1).at n=30A159983
• a(n) is the smallest odd number that has n middle divisors.at n=25A354385
• Numbers k with a record number of proper divisors, where all of them have binary weights that are different from the binary weight of k.at n=30A383365