18500393

Properties

Appears in sequences

• Coefficients for numerical differentiation.at n=11A002701
• Largest prime factor of the n-th central factorial number A001819(n).at n=10A120298
• As p runs through primes >= 5, sequence gives { numerator of Sum_{k=1..p-1} 1/k^2 } / p.at n=3A125551
• Least prime p such that H(2,n) = sum_{k=1..n}1/k^2 == 0 (mod p) but there is no 0 < k < n with H(2,k) == 0 (mod p), or 1 if such a prime p does not exist.at n=11A242241
• Prime numbersat n=1181183