399853domain: NPropertiesPrimalityPrimeyesAppears in sequencesRevert transform of 2*x*(1 - x + x^4)-x/(1+x).at n=11A049174Primes of the form 7n^2 + 6.at n=29A201607a(n) = Sum_{1 <= x_1, x_2, x_3, x_4 <= n} gcd(x_1, x_2, x_3, x_4, n)^5.at n=12A372937Prime numbersat n=33849