%I #10 Dec 06 2024 20:20:26
%S 9,98,999,9996,99995,999996,9999997,99999992,999999999,9999999990,
%T 99999999990,999999999996,9999999999990,99999999999998,
%U 999999999999990,9999999999999984,99999999999999990,999999999999999990,9999999999999999990,99999999999999999980
%N Largest n-digit multiple of n.
%H Harry J. Smith, <a href="/A066557/b066557.txt">Table of n, a(n) for n = 1..150</a>
%F a(n) = floor((10^n-1)/n)*n.
%o (PARI) a(n) = { (10^n - 1)\n*n } \\ _Harry J. Smith_, Feb 22 2010
%Y Cf. A053041, A066558.
%K nonn,base
%O 1,1
%A _Amarnath Murthy_, Dec 17 2001
%E More terms and formula from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 24 2001