OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (10,-9).
FORMULA
G.f.: x*(1 + 63*x)/(1 - 10*x + 9*x^2). - Vincenzo Librandi, Feb 06 2013
a(n) = 10*a(n-1) - 9*a(n-2) for n>2, a(1)=1, a(2)=73. - Vincenzo Librandi, Feb 06 2013
MATHEMATICA
CoefficientList[Series[(1 + 63 x)/(1 - 10 x + 9 x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Feb 06 2013 *)
LinearRecurrence[{10, -9}, {1, 73}, 20] (* Harvey P. Dale, May 22 2014 *)
PROG
(Magma) [9^n-8: n in [1..20]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 15 2010
STATUS
approved