117709domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that denominator of Sum_{k=1..p-1} 1/k^2 is a square and denominator Sum_{k=1..p-1} 1/k^3 is a cube and denominator Sum_{k=1..p-1} 1/k^4 is a fourth power.at n=31A127062a(n) = Sum_{k=1..n} n^(floor(n/k) - 1).at n=6A345030Prime numbersat n=11105