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A171390 a(n) = 37*2^(n-1)-1. 2
36, 73, 147, 295, 591, 1183, 2367, 4735, 9471, 18943, 37887, 75775, 151551, 303103, 606207, 1212415, 2424831, 4849663, 9699327, 19398655, 38797311, 77594623, 155189247, 310378495, 620756991, 1241513983, 2483027967, 4966055935 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

G.f.: x*(36-35*x)/((1-2*x)*(1-x)). - Vincenzo Librandi, Aug 20 2014

MATHEMATICA

Table[37*2^(n-1) - 1, {n, 1, 30}] (* or *) CoefficientList[Series[(36 - 35 x)/((1 - 2 x) (1 - x)), {x, 0, 40}], x] (* Vincenzo Librandi, Aug 20 2014 *)

PROG

(MAGMA) [37*2^(n-1)-1: n in [1..30]]; // Vincenzo Librandi, Aug 20 2014

CROSSREFS

Sequence in context: A024973 A024975 A025399 * A034813 A319602 A262796

Adjacent sequences:  A171387 A171388 A171389 * A171391 A171392 A171393

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Dec 07 2009

EXTENSIONS

Edited by Jon E. Schoenfield, Jun 23 2010

STATUS

approved

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Last modified November 20 14:54 EST 2019. Contains 329337 sequences. (Running on oeis4.)