%I
%S 0,1,3,7,11,15,27,31,39,59,63,103,123,127,131,231,251,255,387,399,487,
%T 507,511,759,899,971,999,1019,1023,1423,1923,2023,2043,2047,3471,3971,
%U 4071,4091,4095,5067,7567,8067,8167,8187,8191,13259,15759,16259,16359
%N Monotonic ordering of nonnegative differences 2^i5^j, for i>=0, j>=0.
%t c = 2; 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. A192115.
%K nonn
%O 1,3
%A _Clark Kimberling_, Jun 23 2011
