This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A009991 Powers of 47. 9
 1, 47, 2209, 103823, 4879681, 229345007, 10779215329, 506623120463, 23811286661761, 1119130473102767, 52599132235830049, 2472159215084012303, 116191483108948578241, 5460999706120583177327 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS The compositions of n in which each natural number is colored by one of p different colors are called p-colored compositions of n. For n >= 1, a(n) equals the number of 47-colored compositions of n such that no adjacent parts have the same color. - Milan Janjic, Nov 17 2011 Numbers n such that sigma(47*n) = 47*n + sigma(n). - Jahangeer Kholdi, Nov 24 2013 LINKS T. D. Noe, Table of n, a(n) for n = 0..100 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (47). FORMULA G.f.: 1/(1-47*x). - Philippe Deléham, Nov 24 2008 a(n) = 47^n; a(n) = 47*a(n-1), a(0)=1. - Vincenzo Librandi, Nov 21 2010 MATHEMATICA 47^Range[0, 13] (* Michael De Vlieger, Jan 13 2018 *) PROG (MAGMA)[47^n: n in [0..20]] // Vincenzo Librandi, Nov 21 2010 (PARI) a(n)=47^n \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Sequence in context: A170766 A218749 A049668 * A052463 A005148 A123798 Adjacent sequences:  A009988 A009989 A009990 * A009992 A009993 A009994 KEYWORD nonn,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 19 19:13 EST 2018. Contains 317364 sequences. (Running on oeis4.)