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A175774 7*(10^n-5) 1
35, 665, 6965, 69965, 699965, 6999965, 69999965, 699999965, 6999999965, 69999999965, 699999999965, 6999999999965, 69999999999965, 699999999999965, 6999999999999965, 69999999999999965, 699999999999999965 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
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
Sequence in context: A010987 A178353 A202127 * A112504 A140405 A367250
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 15 2010.
STATUS
approved

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Last modified June 23 00:47 EDT 2024. Contains 373629 sequences. (Running on oeis4.)