55603domain: NPropertiesPrimalityPrimeyesAppears in sequencesLesser of two consecutive primes, p < q, such that p*q + p - q and p*q - p + q are also consecutive primes.at n=23A225726a(n) = Sum_{k=1..n} binomial(n,k) * floor(n/k).at n=14A308812Prime numbersat n=5640