58051domain: NAppears in sequencesNumbers n such that P(13*n) is prime, where P(n) is the unrestricted partition number.at n=31A113518Expansion of -1 - (sqrt(x^4 + 4*x^3 - 2*x^2 - 4*x + 1) - x^2 - 2*x - 1)/(4*x).at n=11A247172