The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A038865 (n+3)^3 - n^3. 1
 63, 117, 189, 279, 387, 513, 657, 819, 999, 1197, 1413, 1647, 1899, 2169, 2457, 2763, 3087, 3429, 3789, 4167, 4563, 4977, 5409, 5859, 6327, 6813, 7317, 7839, 8379, 8937, 9513, 10107, 10719, 11349, 11997, 12663, 13347, 14049, 14769, 15507, 16263 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (3, -3, 1). FORMULA G.f.: -((9*(3*x^2-8*x+7))/(x-1)^3). - Harvey P. Dale, Mar 04 2014 a(1)=63, a(2)=117, a(3)=189, a(n)=3*a(n-1)-3*a(n-2)+a(n-3). - Harvey P. Dale, Mar 04 2014 MATHEMATICA Table[(n+3)^3-n^3, {n, 50}] (* or *) LinearRecurrence[{3, -3, 1}, {63, 117, 189}, 50] (* Harvey P. Dale, Mar 04 2014 *) PROG (PARI) a(n)=(n+3)^3-n^3 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A166394 A038839 A038851 * A274460 A181556 A096023 Adjacent sequences: A038862 A038863 A038864 * A038866 A038867 A038868 KEYWORD nonn,easy AUTHOR Jeff Burch STATUS approved

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

Last modified September 12 04:22 EDT 2024. Contains 375842 sequences. (Running on oeis4.)