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19, 38, 76, 152, 304, 608, 1216, 2432, 4864, 9728, 19456, 38912, 77824, 155648, 311296, 622592, 1245184, 2490368, 4980736, 9961472, 19922944, 39845888, 79691776, 159383552, 318767104, 637534208, 1275068416, 2550136832, 5100273664, 10200547328, 20401094656
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history;
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OFFSET
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0,1
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COMMENTS
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The first differences are the sequence itself. Doubling the terms gives the same sequence (beginning one step further).
19 times powers of 2. - Omar E. Pol, Dec 17 2008
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..235
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (2).
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FORMULA
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G.f.: 19/(1-2x). - Philippe Deléham, Nov 23 2008
a(n) = A000079(n)*19. - Omar E. Pol, Dec 17 2008
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MATHEMATICA
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19*2^Range[0, 60] (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *)
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PROG
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(MAGMA) [19*2^n: n in [0..40]]; // Vincenzo Librandi, Apr 28 2011
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CROSSREFS
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Cf. A007283, A020714, A005009, A005010, A005015, A005029.
Cf. A000079. - Omar E. Pol, Dec 17 2008
Sequence in context: A048844 A008601 A033900 * A050813 A041712 A041710
Adjacent sequences: A110285 A110286 A110287 * A110289 A110290 A110291
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KEYWORD
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easy,nonn
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AUTHOR
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Alexandre Wajnberg, Sep 07 2005
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EXTENSIONS
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Edited by Omar E. Pol, Dec 16 2008
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STATUS
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approved
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