A279913 Largest n-digit number ending in n.

1, 92, 993, 9994, 99995, 999996, 9999997, 99999998, 999999999, 9999999910, 99999999911, 999999999912, 9999999999913, 99999999999914, 999999999999915, 9999999999999916, 99999999999999917, 999999999999999918, 9999999999999999919, 99999999999999999920

Offset

1,2

Links

Table of n, a(n) for n=1..20.

Formula

a(n) = n + 10^n - 10^(1 + floor(log_10(n))). - Wesley Ivan Hurt, Mar 30 2020

a(n) = 10^n - A089186(n). - Michel Marcus, Jul 25 2022

Mathematica

Table[n + 10^n - 10^(1 + Floor[Log10[n]]), {n, 100}] (* Wesley Ivan Hurt, Mar 30 2020 *)

Prog

(Python)
def A279913(n): return 10**n+n-10**(len(str(n))) # Chai Wah Wu, Jul 25 2022
(PARI) a(n) = 10^n + n - 10^(#Str(n)); \\ Michel Marcus, Jul 25 2022

Crossrefs

Cf. A266959.

Cf. A011557 (10^n), A089186.

Sequence in context: A176630 A281077 A207061 * A172449 A251934 A064203

Adjacent sequences: A279910 A279911 A279912 * A279914 A279915 A279916

Keyword

nonn,base

Author

Wesley Ivan Hurt, Dec 22 2016

Status

approved