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A199116 a(n) = 6*4^n+1. 5
7, 25, 97, 385, 1537, 6145, 24577, 98305, 393217, 1572865, 6291457, 25165825, 100663297, 402653185, 1610612737, 6442450945, 25769803777, 103079215105, 412316860417, 1649267441665, 6597069766657, 26388279066625, 105553116266497 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Bisection (odd part) of A181565 and A201630. - Bruno Berselli, Dec 04 2011
First differences of A221130, a(n) = A221130(n+2) - A221130(n+1). - Jaroslav Krizek, Jan 02 2013
LINKS
FORMULA
a(n) = 4*a(n-1)-3.
a(n) = 5*a(n-1)-4*a(n-2).
G.f.: (7-10*x)/((1-x)*(1-4*x)). - Bruno Berselli, Nov 04 2011
PROG
(Magma) [6*4^n+1: n in [0..30]];
CROSSREFS
Sequence in context: A155258 A261722 A256370 * A304421 A138729 A035509
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 04 2011
STATUS
approved

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Last modified April 12 16:59 EDT 2024. Contains 371635 sequences. (Running on oeis4.)