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A199760 (9*11^n+1)/10. 2
1, 10, 109, 1198, 13177, 144946, 1594405, 17538454, 192922993, 2122152922, 23343682141, 256780503550, 2824585539049, 31070440929538, 341774850224917, 3759523352474086, 41354756877214945, 454902325649364394, 5003925582143008333 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
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
Sequence in context: A267280 A015591 A078922 * A082181 A190919 A095740
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 10 2011
STATUS
approved

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Last modified July 24 15:34 EDT 2024. Contains 374584 sequences. (Running on oeis4.)