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A180596
Digital root of 6n.
7
0, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3, 9, 6, 3
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Period of 3. - Robert G. Wilson v, Sep 20 2010
LINKS
Table of n, a(n) for n=0..104.
Index entries for linear recurrences with constant coefficients, signature (0,0,1).
FORMULA
G.f.: 3*x*(2 + x + 3*x^2)/(1 - x^3). - Stefano Spezia, Apr 21 2022
a(n) = A010888(A008588(n)). - Michel Marcus, Apr 24 2022
MATHEMATICA
f[n_] := Mod[6 n - 1, 9] + 1; f[0] = 0; Array[f, 105, 0] (* Robert G. Wilson v, Sep 20 2010 *)
PadRight[{0}, 120, {9, 6, 3}] (* Harvey P. Dale, Dec 18 2012 *)
CROSSREFS
Cf. A010888, A008588.
Cf. A180592, A180593, A180594, A180595, A180597, A180598, A180599.
Column k = 6 in A353109.
Sequence in context: A135935 A263183 A037905 * A154465 A176533 A214497
Adjacent sequences: A180593 A180594 A180595 * A180597 A180598 A180599
KEYWORD
easy,nonn,base
AUTHOR
Odimar Fabeny, Sep 10 2010
EXTENSIONS
More terms from Robert G. Wilson v, Sep 20 2010
STATUS
approved

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Last modified January 20 22:59 EST 2025. Contains 380086 sequences.
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