OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..100
Index entries for linear recurrences with constant coefficients, signature (20,-100).
FORMULA
a(n) = 7*n*10^(n-1).
G.f.: 7*x/(10*x-1)^2.
MATHEMATICA
Table[7*n*10^(n-1), {n, 0, 20}] (* Harvey P. Dale, Jul 09 2021 *)
PROG
(Magma) [7*n*10^(n-1): n in [0..20]]; // Vincenzo Librandi, Jun 09 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Jul 19 2003
STATUS
approved