1787983

Appears in sequences

• a(n) = floor(4th elementary symmetric function of Sum_{j=1..k} 1/j, k = 1,2,...,n).at n=24A025214
• a(n) = p^2*(p^2+2*p-1)/2, where p = prime(n).at n=13A229738
• a(n) = q^2*(q^2+2*q-1)/2, where q = n-th prime power A000961(n).at n=21A229739