login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A140576 Numbers of the form i*9^j-1 (i=1..8, j >= 0). 9

%I #19 Jun 13 2015 00:52:38

%S 0,1,2,3,4,5,6,7,8,17,26,35,44,53,62,71,80,161,242,323,404,485,566,

%T 647,728,1457,2186,2915,3644,4373,5102,5831,6560,13121,19682,26243,

%U 32804,39365,45926,52487,59048,118097,177146,236195,295244,354293,413342,472391,531440,1062881

%N Numbers of the form i*9^j-1 (i=1..8, j >= 0).

%C A base-9 analog of A051885.

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,0,0,0,0,9,-9).

%F G.f.: x^2*(x+1)*(x^2+1)*(x^4+1) / ((x-1)*(3*x^4-1)*(3*x^4+1)). [_Colin Barker_, Feb 01 2013]

%Y Smallest number whose base b sum of digits is n: A000225 (b=2), A062318 (b=3), A180516 (b=4), A181287 (b=5), A181288 (b=6), A181303 (b=7), A165804 (b=8), this sequence (b=9), A051885 (b=10). - _Jason Kimberley_, Nov 02 2011

%K nonn,easy

%O 1,3

%A _N. J. A. Sloane_, Jan 25 2011

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 18 22:50 EDT 2024. Contains 370951 sequences. (Running on oeis4.)