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A021031 Decimal expansion of 1/27. 0
0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7, 0, 3, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..98.

FORMULA

Contribution from Bruno Berselli, Sep 24 2010: (Start)

G.f.: x*(3+7*x)/(1-x^3).

a(n)-a(n-3) = 0 for n>2.

a(n) = A175833(n)-4 = 4*(n-3*floor(n/3))-(1-(-1)^(n-3*floor((n+1)/3)))/2.

a(n) = (31*(n mod 3)-2*(n+1 mod 3)+(n+2 mod 3))/9 (cf. forms of modular arithmetic of Paolo P. Lava, i.e. see A146094). (End)

CROSSREFS

Sequence in context: A033920 A005600 A180873 * A197835 A197005 A199778

Adjacent sequences:  A021028 A021029 A021030 * A021032 A021033 A021034

KEYWORD

nonn,cons

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 25 07:38 EDT 2013. Contains 225646 sequences.