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A156203
a(n) = 2*a(n-1) + 3 for n>1, a(1)=14.
1
14, 31, 65, 133, 269, 541, 1085, 2173, 4349, 8701, 17405, 34813, 69629, 139261, 278525, 557053, 1114109, 2228221, 4456445, 8912893, 17825789, 35651581, 71303165, 142606333, 285212669, 570425341, 1140850685, 2281701373
OFFSET
1,1
LINKS
FORMULA
a(n) = 17*2^(n-1)-3.
G.f. x*(14-11*x)/((1-x)*(1-2*x)). [R. J. Mathar, Feb 09 2009]
MATHEMATICA
CoefficientList[Series[(14 - 11 x)/((1-x) (1-2 x)), {x, 0, 40}], x] (* Vincenzo Librandi, Apr 08 2013 *)
PROG
(Magma) [17*2^(n-1)-3: n in [1..30]]; // Vincenzo Librandi, Apr 08 2013
CROSSREFS
Sequence in context: A344397 A161454 A367950 * A338389 A196135 A276301
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Feb 08 2009
EXTENSIONS
Corrected typo in a(11) by R. J. Mathar, Feb 09 2009
STATUS
approved