OFFSET
0,1
COMMENTS
Continued fraction expansion of A176105. - R. J. Mathar, Mar 08 2012
Digital roots of A007283. - Bruno Berselli, Nov 22 2018
Decimal expansion of 4/11. - Franklin T. Adams-Watters, Nov 28 2018
LINKS
FORMULA
G.f. 3*(1 + 2*x)/((1 - x)*(1 + x)). - R. J. Mathar, Nov 21 2011
From Reinhard Zumkeller, Jul 03 2012: (Start)
a(n) = 3*A000034(n).
a(n) = A213999(n,2). (End)
a(n + 1) = 9 - a(n). - David A. Corneth, Nov 29 2018
a(n) = 2 + 2^(1 - (-1)^n). - Vincenzo Librandi, Feb 28 2020
a(n) = 3*(3-(-1)^n)/2. - Aaron J Grech, Aug 02 2024
MAPLE
seq(op([3, 6]), n=1..60); # Muniru A Asiru, Nov 29 2018
MATHEMATICA
PadRight[{}, 120, {3, 6}] (* Harvey P. Dale, Dec 12 2012 *)
PROG
(PARI) a(n)=3+n%2*3 \\ Charles R Greathouse IV, Dec 21 2011
(Haskell)
a010704 n = (* 3) . a000034
a010704_list = cycle [3, 6] -- Reinhard Zumkeller, Jul 03 2012
(GAP) Flat(List([1..60], n->[3, 6])); # Muniru A Asiru, Nov 29 2018
(Magma) &cat [[3, 6]^^50]; // Vincenzo Librandi, Feb 28 2020
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved