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a(n) is the least positive integer in base 10 containing n fives that is divisible by n.
19

%I #6 Mar 31 2012 10:29:22

%S 5,550,555,55552,55555,5555550,35555555,555555552,555555555,

%T 55555555550,555555555555,5555555555556,52555555555555,

%U 1555555555555554,555555555555555,55555555555555552,515555555555555555

%N a(n) is the least positive integer in base 10 containing n fives that is divisible by n.

%F a(n) = n*A112901(n).

%e a(4) = 55552 because 55552 contains 4 fives and is divisible by 4.

%Y Cf. A112889-A112898, A112901-A112905, A112907-A112910.

%K base,nonn

%O 1,1

%A _Ray G. Opao_, Oct 05 2005

%E Extended by _Ray Chandler_ and Brandon S. Paster (bsp11(AT)psu.edu), Oct 09 2005