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A279913 Largest n-digit number ending in n. 2
1, 92, 993, 9994, 99995, 999996, 9999997, 99999998, 999999999, 9999999910, 99999999911, 999999999912, 9999999999913, 99999999999914, 999999999999915, 9999999999999916, 99999999999999917, 999999999999999918, 9999999999999999919, 99999999999999999920 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 6 00:49 EDT 2022. Contains 357261 sequences. (Running on oeis4.)