530797domain: NPropertiesPrimalityPrimeyesAppears in sequencesA sequence of primes such that {a(n)-a(n-1)}/{a(n-1)-a(n-2)} is a unique integer.at n=10A084761Number of representations of n as a sum of products of pairs of positive integers, considered to be equivalent when terms or factors are reordered.at n=44A182269Prime numbersat n=43890