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 A083227 a(n) = (9*10^n + (-10)^n)/10. 2
 1, 8, 100, 800, 10000, 80000, 1000000, 8000000, 100000000, 800000000, 10000000000, 80000000000, 1000000000000, 8000000000000, 100000000000000, 800000000000000, 10000000000000000, 80000000000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (0,100). FORMULA a(n) = (9*10^n + (-10)^n)/10. G.f.: (1+8*x)/((1+10*x)*(1-10*x)). E.g.f.: (9*exp(10*x) + exp(-10*x))/10. MATHEMATICA LinearRecurrence[{0, 100}, {1, 8}, 20] (* Harvey P. Dale, Jun 02 2019 *) PROG (Magma) [(9*10^n+(-10)^n)/10: n in [0..25]]; // Vincenzo Librandi, Jun 29 2011 (PARI) a(n)= (9*10^n+(-10)^n)/10 \\ Charles R Greathouse IV, Jun 29 2011 CROSSREFS Cf. A083226. Sequence in context: A316870 A181034 A324067 * A261742 A222486 A229282 Adjacent sequences: A083224 A083225 A083226 * A083228 A083229 A083230 KEYWORD easy,nonn AUTHOR Paul Barry, Apr 23 2003 STATUS approved

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Last modified August 14 02:49 EDT 2024. Contains 375146 sequences. (Running on oeis4.)