12956275471domain: NAppears in sequencesInitial term of a set of consecutive primes {p1, p2, p3, p4, p5} such that Sum_{k=p1..p2} d(k) = Sum_{k=p2..p3} d(k) = Sum_{k=p3..p4} d(k) = Sum_{k=p4..p5} d(k), where d(k) is the number of divisors function A000005.at n=20A353554