836291domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes such that p and p^2 have same set of digits.at n=18A030091a(n) = A025179(n-2) + A102839(n-4), for n >= 4, with a(0) = a(2) = 0 and a(1) = a(3) = 1.at n=16A352916Prime numbersat n=66627