%I #5 Mar 30 2012 19:00:24
%S 1,7,9,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 0,0,0,0,0,0
%N a(n) = the largest 1-digit number with exactly n divisors, a(n) = 0 if no such number exists.
%F A000005(a(n)) = n for n <= 4.
%F 4 = max n such that a(n) > 0, a(n) = 0 for n > 4.
%Y Cf. A182687.
%K nonn,base,less
%O 1,2
%A _Jaroslav Krizek_, Nov 27 2010