OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..900
Index entries for linear recurrences with constant coefficients, signature (12,-11).
FORMULA
G.f.: (1-2*x)/((1-x)*(1-11*x)).
a(n) = 12*a(n-1)-11*a(n-2).
a(n) = 11*a(n-1)-1.
a(n) = 11^n - sum(11^i, i=0..n-1) for n>0. [Bruno Berselli, Jun 20 2013]
PROG
(Magma) [(9*11^n+1)/10: n in [0..30]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 10 2011
STATUS
approved