181860254581domain: NAppears in sequencesa(n) = numerator of b(n), where b(1) = 2, b(n) = b(n-1) - 1/b(n-1).at n=6A127814a(n) = a(n-1)^2 + a(n-1)*a(n-2)^2 - a(n-2)^4 with a(1) = 2, a(2) = 3.at n=6A242995