75646domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(715).at n=9A042376a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = -1, a(1) = -1, a(2) = 2, a(3) = 3.at n=20A295722