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%I #11 Sep 26 2020 03:55:49
%S 1,3,6,9,18,27,36,54,81,108,162,216,243,324,486,648,729,972,1296,1458,
%T 1944,2187,2916,3888,4374,5832,6561,7776,8748,11664,13122,17496,19683,
%U 23328,26244,34992,39366,46656,52488,59049,69984,78732,104976,118098
%N Numbers of form 3^i*6^j, with i, j >= 0.
%H Amiram Eldar, <a href="/A025614/b025614.txt">Table of n, a(n) for n = 1..10000</a>
%F Sum_{n>=1} 1/a(n) = (3*6)/((3-1)*(6-1)) = 9/5. - _Amiram Eldar_, Sep 26 2020
%F a(n) ~ exp(sqrt(2*log(3)*log(6)*n)) / sqrt(18). - _Vaclav Kotesovec_, Sep 26 2020
%t n = 10^6; Flatten[Table[3^i*6^j, {i, 0, Log[3, n]}, {j, 0, Log[6, n/3^i]}]] // Sort (* _Amiram Eldar_, Sep 26 2020 *)
%Y A025628 is a subsequence.
%Y Cf. A003586, A003593, A003594, A003597, A107364.
%Y Cf. A025610, A025618, A025622, A025626, A025627.
%K easy,nonn
%O 1,2
%A _David W. Wilson_
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