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 A173259 Period 3: repeat [4, 1, 4]. 2
 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4, 1, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Index entries for linear recurrences with constant coefficients, signature (0,0,1). FORMULA G.f.: (x + 4*x^2 + x^3)/(1 - x^3). From Wesley Ivan Hurt, Jul 01 2016: (Start) a(n) = a(n-3) for n>3. a(n) = 3 + cos(2*n*Pi/3) + sqrt(3)*sin(2*n*Pi/3). (End) MAPLE seq(op([4, 1, 4]), n=1..50); # Wesley Ivan Hurt, Jul 01 2016 MATHEMATICA PadRight[{}, 100, {4, 1, 4}] (* Wesley Ivan Hurt, Jul 01 2016 *) PROG (PARI) a(n)=[4, 1, 4][n%3+1] \\ Charles R Greathouse IV, Jun 02 2011 (MAGMA) &cat [[4, 1, 4]^^30]; // Wesley Ivan Hurt, Jul 01 2016 CROSSREFS Sequence in context: A060037 A229705 A321593 * A267633 A021711 A117445 Adjacent sequences:  A173256 A173257 A173258 * A173260 A173261 A173262 KEYWORD nonn,easy,less AUTHOR Paul Curtz, Nov 22 2010 STATUS approved

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Last modified July 18 07:10 EDT 2019. Contains 325134 sequences. (Running on oeis4.)