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A020707 Pisot sequences E(4,8), L(4,8), P(4,8), T(4,8). 11
4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, 67108864, 134217728, 268435456, 536870912, 1073741824, 2147483648, 4294967296, 8589934592 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Subsequence of A051916. - Reinhard Zumkeller, Mar 20 2010
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
a(n) = 2^(n+2).
a(n) = 2*a(n-1).
G.f.: 4/(1-2*x). - Philippe Deléham, Nov 23 2008
E.g.f.: 4*exp(2*x). - Stefano Spezia, May 15 2021
MATHEMATICA
2^(Range[0, 50] + 2) (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *)
PROG
(Magma) [2^(n+2): n in [0..40]]; // Vincenzo Librandi, Apr 28 2011
(PARI) a(n)=4<<n \\ Charles R Greathouse IV, Apr 08 2012
CROSSREFS
Subsequence of A000079. See A008776 for definitions of Pisot sequences.
Cf. A051916.
Sequence in context: A233442 A046055 A186949 * A151821 A147639 A049934
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)