56387

Appears in sequences

• Sum of squares of the first n primes.at n=23A024450
• Consider the line segment in R^n from the origin to the point v=(2,3,5,7,11,...) with prime coordinates; let d = squared distance to this line from the closest point of Z^n (excluding the endpoints). Sequence gives d times v.v.at n=23A059804
• Numerator of Sum[ Prime[k]^2, {k,1,n}] / Product[ Prime[k], {k,1,n}] = Numerator[ A024450[n] / A002110[n] ].at n=23A122136
• Numerator of the contraharmonic mean of the first n primes.at n=23A296199