%I
%S 1,3,5,7,15,21,35,105,9,25,45,49,63,75,147,175,225,245,315,441,525,
%T 735,1225,1575,2205,3675,11025,27,125,135,189,343,375,675,875,945,
%U 1029,1125,1323,1715,2625,3087,3375,4725,5145,6125,6615,7875,8575,9261,15435
%N Triangle of divisors of 105^n, each number occurring once.
%C The length of row k is A003215(k), the centered hexagonal numbers, 3k^2 + 3k + 1.
%H T. D. Noe, <a href="/A194360/b194360.txt">Rows n = 0..20</a>
%e The triangle has rows beginning with 3^k and ending with 105^k:
%e 1
%e 3, 5, 7, 15, 21, 35, 105
%e 9, 25, 45, 49, 63, 75, 147, 175, 225, 245, 315, 441, 525, 735, 1225, 1575, 2205, 3675, 11025
%t Join[{{1}}, Table[Complement[Divisors[105^n], Divisors[105^(n1)]], {n, 9}]]
%Y Cf. A194356, A194357, A194358, A194359.
%Y Cf. A108347 (numbers of the form (3^i)*(5^j)*(7^k))
%K nonn,tabf
%O 0,2
%A _T. D. Noe_, Sep 08 2011
