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A029747 2^n times 1, 3 or 5. 24
1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 80, 96, 128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 1280, 1536, 2048, 2560, 3072, 4096, 5120, 6144, 8192, 10240, 12288, 16384, 20480, 24576, 32768 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Fixed points of the Doudna sequence: A005940(a(n))=A005941(a(n))=a(n). - Reinhard Zumkeller, Aug 23 2006

Subsequence of A103969. - R. J. Mathar, Mar 06 2010

LINKS

Table of n, a(n) for n=0..42.

Index entries for linear recurrences with constant coefficients, signature (0, 0, 2).

FORMULA

a(n) = if n<5 then n+1 else 2*a(n-3). - Reinhard Zumkeller, Aug 23 2006

G.f.: (1+x+x^2)^2/(1-2*x^3). - R. J. Mathar, Mar 06 2010

CROSSREFS

Cf. A122132, A000079, A007283, A020714.

Sequence in context: A015702 A245709 A253789 * A095381 A233205 A158292

Adjacent sequences:  A029744 A029745 A029746 * A029748 A029749 A029750

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified March 28 21:25 EDT 2017. Contains 284246 sequences.