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A013830 a(n) = 4^(5*n + 1). 3
4, 4096, 4194304, 4294967296, 4398046511104, 4503599627370496, 4611686018427387904, 4722366482869645213696, 4835703278458516698824704, 4951760157141521099596496896, 5070602400912917605986812821504 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
FORMULA
From Philippe Deléham, Nov 30 2008: (Start)
a(n) = 1024*a(n-1), n > 0; a(0)=4.
G.f.: 4/(1-1024*x). (End)
MATHEMATICA
4^(5Range[0, 20]+1) (* or *) NestList[1024#&, 4, 20] (* Harvey P. Dale, Oct 04 2011 *)
PROG
(Magma) [4^(5*n+1): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011
(PARI) a(n)=4^(5*n+1) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
Cf. A000302 (4^n), A016861 (5*n+1).
Sequence in context: A221191 A110104 A024061 * A320860 A067482 A249804
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified June 14 21:27 EDT 2024. Contains 373401 sequences. (Running on oeis4.)