225569domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form x^2 + 17*y^2, where x and y=x+1 are consecutive natural numbers.at n=23A176622Number of n X 4 binary arrays with every 1 having exactly two king-move neighbors equal to 1.at n=10A183445Prime numbersat n=20068