357613domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that remain prime through 4 iterations of the function f(x) = 3x + 4.at n=15A023308Expansion of g.f.: (1+x - sqrt(1-2*x-3*x^2-4*x^3))/(2+2*x+2*x^2).at n=15A108629Prime numbersat n=30570