A171390 a(n) = 37*2^(n-1)-1.

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

Offset: 1

Author

Vincenzo Librandi, Dec 07 2009

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000
• Index entries for linear recurrences with constant coefficients, signature (3, -2).

Programs

Magma

[37*2^(n-1)-1: n in [1..30]]; // 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 *)

Formula

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

Extensions

Edited by Jon E. Schoenfield, Jun 23 2010