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%I #25 Jul 25 2022 04:03:00
%S 1,92,993,9994,99995,999996,9999997,99999998,999999999,9999999910,
%T 99999999911,999999999912,9999999999913,99999999999914,
%U 999999999999915,9999999999999916,99999999999999917,999999999999999918,9999999999999999919,99999999999999999920
%N Largest n-digit number ending in n.
%F a(n) = n + 10^n - 10^(1 + floor(log_10(n))). - _Wesley Ivan Hurt_, Mar 30 2020
%F a(n) = 10^n - A089186(n). - _Michel Marcus_, Jul 25 2022
%t Table[n + 10^n - 10^(1 + Floor[Log10[n]]), {n, 100}] (* _Wesley Ivan Hurt_, Mar 30 2020 *)
%o (Python)
%o def A279913(n): return 10**n+n-10**(len(str(n))) # _Chai Wah Wu_, Jul 25 2022
%o (PARI) a(n) = 10^n + n - 10^(#Str(n)); \\ _Michel Marcus_, Jul 25 2022
%Y Cf. A266959.
%Y Cf. A011557 (10^n), A089186.
%K nonn,base
%O 1,2
%A _Wesley Ivan Hurt_, Dec 22 2016