login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A057933 Floor[(80/81)*10^n]. 1
9, 98, 987, 9876, 98765, 987654, 9876543, 98765432, 987654320, 9876543209, 98765432098, 987654320987, 9876543209876, 98765432098765, 987654320987654, 9876543209876543, 98765432098765432, 987654320987654320 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

FORMULA

G.f.:(9x+8x^2+7x^3+6x^4+5x^5+4x^6+3x^7+2x^8)/((1-10x)(1-x^9)).

a(n)=10*a(n-1)-(n%9)+10*(n%9!=0).

MATHEMATICA

Floor[80/81*10^Range[20]] (* Harvey P. Dale, May 28 2017 *)

PROG

(PARI) a(n)=10^n*80\81

CROSSREFS

Cf. A057932.

Sequence in context: A076758 A085868 A147637 * A064617 A225608 A220490

Adjacent sequences:  A057930 A057931 A057932 * A057934 A057935 A057936

KEYWORD

nonn

AUTHOR

Henry Bottomley, Oct 04 2000

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 17 23:21 EDT 2019. Contains 325109 sequences. (Running on oeis4.)