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A199024
6*11^n-1.
1
5, 65, 725, 7985, 87845, 966305, 10629365, 116923025, 1286153285, 14147686145, 155624547605, 1711870023665, 18830570260325, 207136272863585, 2278499001499445, 25063489016493905, 275698379181432965, 3032682170995762625
OFFSET
0,1
FORMULA
a(n) = 11*a(n-1)+10.
a(n) = 12*a(n-1)-11*a(n-2), n>1.
G.f.: 5*(1 + x)/(1 - 12*x + 11*x^2). - Vincenzo Librandi, Jan 04 2013
MATHEMATICA
CoefficientList[Series[5*(1 + x)/(1 - 12*x + 11*x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 04 2013 *)
PROG
(Magma) [6*11^n-1 : n in [0..20]]
CROSSREFS
Sequence in context: A118004 A281232 A236321 * A155653 A087453 A103974
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 02 2011
STATUS
approved