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%I #6 Oct 21 2019 14:56:11
%S 0,1,4,9,21,24,61,109,121,124,369,561,609,621,624,2101,2869,3061,3109,
%T 3121,3124,11529,12589,14601,15369,15561,15609,15621,15624,61741,
%U 74029,77101,77869,78061,78109,78121,78124,128481,325089,374241,386529,389601,390369
%N Monotonic ordering of nonnegative differences 5^i-4^j, for 40>= i>=0, j>=0.
%t c = 5; d = 4; 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. A192161.
%K nonn
%O 1,3
%A _Clark Kimberling_, Jun 24 2011
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