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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A125837 Numbers whose base 8 or octal representation is 6666666......6. 1
0, 6, 54, 438, 3510, 28086, 224694, 1797558, 14380470, 115043766, 920350134, 7362801078, 58902408630, 471219269046, 3769754152374, 30158033218998, 241264265751990, 1930114126015926, 15440913008127414, 123527304065019318 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (9,-8).

FORMULA

a(n) = 6*(8^(n-1)-1)/7 = 6*A023001(n-1).

a(n) = 8*a(n-1)+6 for n>1, a(1)=0. [Vincenzo Librandi, Oct 03 2010]

G.f.: 6*x^2 / ( (8*x-1)*(x-1) ). - R. J. Mathar, Oct 07 2016

MAPLE

seq(6*(8^n-1)/7, n=0..20);

MATHEMATICA

FromDigits[#, 8]&/@Table[Table[6, {i}], {i, 0, 25}]  (* Harvey P. Dale, Mar 19 2011 *)

CROSSREFS

Sequence in context: A300583 A060774 A043026 * A065088 A202364 A177484

Adjacent sequences:  A125834 A125835 A125836 * A125838 A125839 A125840

KEYWORD

nonn,easy

AUTHOR

Zerinvary Lajos, Feb 03 2007

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 June 24 22:13 EDT 2019. Contains 324337 sequences. (Running on oeis4.)