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A105396 A simple "Fractal Jump Sequence" (FJS). 1
3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6, 3, 6, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

COMMENTS

See A105397 for definition of Fractal Jump Sequence.

From Vincenzo Librandi, Nov 13 2010: (Start)

First digit after the decimal point in the decimal expansion of (n^2 - 2)/3 (with n > 2). Examples:

for n=3, (3^2-2)/3 =  2.(3);

for n=4, (4^2-2)/3 =  4.(6);

for n=5, (5^2-2)/3 =  7.(6);

for n=6, (6^2-2)/3 = 11.(3);

for n=7, (7^2-2)/3 = 15.(6). (End)

LINKS

Table of n, a(n) for n=3..107.

FORMULA

From Robert Israel, Aug 04 2019: (Start)

a(n)=3 if 3|n, otherwise a(n)=6.

G.f.: 3*(1+2*x+2*x^2)*x^3/(1-x^3). (End)

CROSSREFS

Equals 3*A130196.

Sequence in context: A309448 A016662 A258271 * A247685 A185735 A339021

Adjacent sequences:  A105393 A105394 A105395 * A105397 A105398 A105399

KEYWORD

base,easy,nonn

AUTHOR

Eric Angelini, May 01 2005

STATUS

approved

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Last modified January 23 15:15 EST 2021. Contains 340385 sequences. (Running on oeis4.)