%I #7 Oct 21 2019 19:14:50
%S 0,4,8,56,76,80,104,604,704,724,728,3436,5936,6436,6536,6556,6560,
%T 43424,55924,58424,58924,59024,59044,59048,140816,453316,515816,
%U 528316,530816,531316,531416,531436,531440,2829844,4392344,4704844,4767344,4779844,4782344
%N Monotonic ordering of nonnegative differences 9^i-5^j, for 40>= i>=0, j>=0.
%t c = 9; d = 5; t[i_, j_] := c^i - d^j;
%t u = Table[t[i, j], {i, 0, 40}, {j, 0, i*Log[d, c]}];
%t v = Union[Flatten[u ]]
%Y Cf. A192199.
%K nonn
%O 1,2
%A _Clark Kimberling_, Jun 25 2011