87631domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes from merging of 5 successive digits in decimal expansion of Zeta(2) or (Pi^2)/6.at n=31A105378Primes of the form n^2 + 15.at n=39A243450Number of series-reduced balanced rooted trees whose leaves form an integer partition of n.at n=18A320160Prime numbersat n=8509