80457

Appears in sequences

• a(n) = Sum_{j=1..n} j*prime(j).at n=38A014285
• A generalized Engel expansion of 1/Pi.at n=7A232327
• Numbers m with the property that its k-th smallest divisor, for all 1 <= k <= tau(m), contains exactly k "1" digits in its binary representation.at n=31A255401
• Numerator of the barycenter of first n primes defined as a(n) = numerator(Sum_{i=1..n} (i*prime(i)) / Sum_{i=1..n} prime(i)).at n=38A306834