%I
%S 1,2,5,10,4,20,25,50,100,8,40,125,200,250,500,1000,16,80,400,625,1250,
%T 2000,2500,5000,10000,32,160,800,3125,4000,6250,12500,20000,25000,
%U 50000,100000,64,320,1600,8000,15625,31250,40000,62500,125000,200000,250000
%N Triangle of divisors of 10^n, each number occurring once.
%H T. D. Noe, <a href="/A194356/b194356.txt">Rows for n = 0..100</a>
%e The triangle has rows beginning with 2^k and ending with 10^k:
%e 1
%e 2, 4, 10
%e 4, 20, 25, 50, 100
%e 8, 40, 125, 200, 250, 500, 1000
%e 16, 80, 400, 625, 1250, 2000, 2500, 5000, 10000
%t Join[{{1}}, Table[Complement[Divisors[10^n], Divisors[10^(n1)]], {n, 9}]]
%Y Cf. A194357 (divisors of 6^n), A194358 (divisors of 30^n).
%Y Cf. A003592 (numbers of the form 2^i*5^j).
%K nonn,tabf
%O 0,2
%A _T. D. Noe_, Aug 25 2011
