

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
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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, (3^22)/3 = 2.(3);
for n=4, (4^22)/3 = 4.(6);
for n=5, (5^22)/3 = 7.(6);
for n=6, (6^22)/3 = 11.(3);
for n=7, (7^22)/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 3n, otherwise a(n)=6.
G.f.: 3*(1+2*x+2*x^2)*x^3/(1x^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



