383347domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 1, a(1) = 3, a(2) = 4, a(3) = 5.at n=30A295718Expansion of e.g.f. 1/(1 - arcsinh(3*x))^(1/3).at n=7A385420Prime numbersat n=32550