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 A015009 q-factorial numbers for q=10. 1
 1, 11, 1221, 1356531, 15072415941, 1674711207620451, 1860790044610366931061, 20675444733360738721748118771, 2297271634742810443154153338805764581, 2552524038347870310755413660544832496799359491, 28361378203581611893021499527080870668821235178133404501 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..40 FORMULA Prod_{k=1}^{n} (q^k - 1)/(q - 1). a(1) = 1, a(n) = (10^n - 1)*a(n-1)/9. - Vincenzo Librandi, Oct 26 2012 MATHEMATICA RecurrenceTable[{a[1]==1, a[n]==((10^n-1) * a[n-1])/9}, a, {n, 15}] (* Vincenzo Librandi, Oct 26 2012 *) PROG (MAGMA) [n le 1 select 1 else (10^n-1)*Self(n-1)/9: n in [1..15]]; // Vincenzo Librandi, Oct 26 2012 CROSSREFS Sequence in context: A180581 A019524 A078269 * A068326 A001323 A182553 Adjacent sequences:  A015006 A015007 A015008 * A015010 A015011 A015012 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified May 22 05:54 EDT 2013. Contains 225511 sequences.