OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..100
Index entries for linear recurrences with constant coefficients, signature (11, -10).
FORMULA
a(n) = 10*a(n-1) +315. - Vincenzo Librandi, Jul 12 2012
G.f.: x*(35+280*x)/((1-10*x)*(1-x)). - Vincenzo Librandi, Jul 12 2012
MATHEMATICA
CoefficientList[Series[(35+280*x)/((1-10*x)*(1-x)), {x, 0, 20}], x] (* Vincenzo Librandi, Jul 12 2012 *)
PROG
(Magma) [7*(10^n-5): n in [1..20]]; // Vincenzo Librandi, Jul 12 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 15 2010.
STATUS
approved