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A125833 Numbers whose base 5 representation is 333333.......3. 4
0, 3, 18, 93, 468, 2343, 11718, 58593, 292968, 1464843, 7324218, 36621093, 183105468, 915527343, 4577636718, 22888183593, 114440917968, 572204589843, 2861022949218, 14305114746093, 71525573730468, 357627868652343 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..21.

Index entries for linear recurrences with constant coefficients, signature (6,-5).

FORMULA

a(n) = 3*(5^n-1)/4.

a(n) = 5*a(n-1)+3 for n>0, a(0)=0. - Vincenzo Librandi, Sep 30 2010

EXAMPLE

Base 5.................decimal

0.........................0

3.........................3

33.......................18

333......................93

3333....................468

33333..................2343

333333................11718

3333333...............58593

33333333.............292968, etc.

MAPLE

seq(3*(5^n-1)/4, n=0..21);

MATHEMATICA

Table[FromDigits[PadRight[{}, n, 3], 5], {n, 0, 30}] (* or *) LinearRecurrence[ {6, -5}, {0, 3}, 30] (* Harvey P. Dale, Sep 23 2016 *)

CROSSREFS

Sequence in context: A092691 A064671 A058409 * A129547 A081151 A132848

Adjacent sequences:  A125830 A125831 A125832 * A125834 A125835 A125836

KEYWORD

nonn,easy

AUTHOR

Zerinvary Lajos, Feb 03 2007

STATUS

approved

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Last modified March 19 13:25 EDT 2019. Contains 321330 sequences. (Running on oeis4.)