60144

Appears in sequences

• a(n) = Z(S_m; sigma[1](n), sigma[2](n),..., sigma[m](n)) where Z(S_m; x_1,x_2,...,x_m) is the cycle index of the symmetric group S_m and sigma[k](n) is the sum of k-th powers of divisors of n; m=3.at n=32A068020
• Row square-sums of triangle A096815.at n=12A212265
• Number of set partitions of {1..n} with block-medians summing to an integer.at n=9A361911
• Integers k such that there exists an integer 0<m<k such that (1/sigma(m)^2 + 1/sigma(k)^2)*(m+k)^2 = 1.at n=17A383964