94265domain: NAppears in sequencesa(n) = (4*7^n + (-3)^n)/5.at n=6A083300a(n) = (4*(n+1)^n + (n-9)^n)/5.at n=6A083308Hypotenuses of primitive Pythagorean triples in A195680 and A195681.at n=3A195682