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%I #7 Sep 01 2016 03:52:30
%S 1,2,4,5,3,6,8,7,6,12,12,15,8,10,12,14,8,15,8,12,18,18,12,18,18,18,12,
%T 20,12,24,16,10,16,12,24,24,16,12,18,30,16,24,16,14,24,20,12,21,8,15,
%U 12,20,12,20,18,30,24,20,12,30,16,12,24,20,18,24,16,14,16,24,16,24,16,12
%N a(1) = 1, a(n) = number of divisors of n*a(n-1).
%C a(n)=A000005(n*a(n-1)) for n>1, a(1)=1;
%C see A119792 and A119793 for record values and where they occur: A119792(n)=a(A119793(n)).
%H Ivan Neretin, <a href="/A119791/b119791.txt">Table of n, a(n) for n = 1..10000</a>
%t Fold[Append[#1, DivisorSigma[0, #1[[-1]]*#2]] &, {1}, Range[2, 74]] (* _Ivan Neretin_, Sep 01 2016 *)
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, May 24 2006
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