71479domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 22*(n^2)+1.at n=25A117049Expansion of x*(1 + 2*x - 3*x^2 + 4*x^3) / (1 - x - x^2 + x^3 - x^4).at n=27A322753Prime numbersat n=7081