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a(n) = the largest n-digit number with exactly 11 divisors, a(n) = 0 if no such number exists.
1

%I #5 Mar 30 2012 19:00:24

%S 0,0,0,1024,59049,0,9765625,0,282475249,0,25937424601,137858491849,

%T 6131066257801,41426511213649,819628286980801,4808584372417849,

%U 52599132235830049,713342911662882601,9468276082626847201,73742412689492826049,339456738992222314849,9099059901039401398249

%N a(n) = the largest n-digit number with exactly 11 divisors, a(n) = 0 if no such number exists.

%C a(n) = the largest n-digit number of the form p^10 (p = prime), a(n) = 0 if no such number exists.

%F A000005(a(n)) = 11.

%F a(n) >= A182681(n).

%Y Cf. A030629, A182681.

%K nonn,base

%O 1,4

%A _Jaroslav Krizek_, Nov 27 2010