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A122553 a(0)=1, a(n)=3 for n>0. 15
1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Continued fraction for ((sqrt(13) - 1))/2.

Decimal expansion of 4/30. - Alonso del Arte, Aug 16 2012

LINKS

Table of n, a(n) for n=0..104.

Index entries for linear recurrences with constant coefficients, signature (1).

FORMULA

a(n) = 3 - 2*0^n . G.f. : (1 + 2*x)/(1 - x) . Sum_{n, n >= 0} a(n)*10^(-n) = 4/3.

MATHEMATICA

RealDigits[4/3, 10, 105][[1]] (* Alonso del Arte, Aug 16 2012 *)

PROG

(PARI) a(n)=(n>=0)+2*(n>0) \\ From Jaume Oliver Lafont, Mar 26 2009

CROSSREFS

Sequence in context: A010701 A290858 A174971 * A157831 A032552 A087717

Adjacent sequences:  A122550 A122551 A122552 * A122554 A122555 A122556

KEYWORD

nonn,cofr,easy,cons

AUTHOR

Philippe Deléham, Sep 20 2006

STATUS

approved

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Last modified February 19 12:48 EST 2018. Contains 299333 sequences. (Running on oeis4.)