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A013780 4^(4n+1). 2
4, 1024, 262144, 67108864, 17179869184, 4398046511104, 1125899906842624, 288230376151711744, 73786976294838206464, 18889465931478580854784, 4835703278458516698824704, 1237940039285380274899124224 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Tanya Khovanova, Recursive Sequences

FORMULA

a(n)=256*a(n-1), n>0 ; a(0)=4 . G.f.: 4/(1-256*x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 27 2008]

PROG

(MAGMA) [4^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 17 2011

CROSSREFS

Sequence in context: A087365 A024059 A069920 * A139300 A004804 A159859

Adjacent sequences:  A013777 A013778 A013779 * A013781 A013782 A013783

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 16 20:47 EST 2012. Contains 205965 sequences.