263429domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes whose base-4 representation also is the base 2-representation of a prime.at n=36A235461Expansion of Sum_{n>=0} x^n * Sum_{k=0..n} C(n,k)^2 * x^(3*k).at n=23A246883Prime numbersat n=23103