61158domain: NAppears in sequences24 'Reverse and Add' steps are needed to reach a palindrome.at n=23A065318Largest achievable determinant of a 3 X 3 matrix whose elements are 9 distinct integers chosen from the range -n...n.at n=22A097693Expansion of (1 + x - x^2 - x^3 - x^4)/((1 - x)*(1 - x - 2*x^2 - 2*x^3 - x^4)).at n=13A272362