20322481domain: NPropertiesPrimalityPrimeyesAppears in sequencesLeast prime numbers, in ascending order, such that each of them can be written, in a unique way, in the form x^2 + h*y^2, where x, y are natural numbers, while h takes all the values of the sequence A000926 (idoneal numbers).at n=20A340132Prime numbersat n=1289764