This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A050408 a(n)=117*n^2/2-99*n/2+1. 1
 1, 10, 136, 379, 739, 1216, 1810, 2521, 3349, 4294, 5356, 6535, 7831, 9244, 10774, 12421, 14185, 16066, 18064, 20179, 22411, 24760, 27226, 29809, 32509, 35326, 38260, 41311, 44479, 47764, 51166, 54685, 58321, 62074, 65944, 69931, 74035 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA G.f. ( -1-7*x-109*x^2 ) / (x-1)^3 . - R. J. Mathar, Jul 01 2011 PROG (MAGMA) [117*n^2/2-99*n/2+1: n in [0..45]]; // Vincenzo Librandi, Jul 05 2011 (PARI) a(n)=117*n^2/2-99*n/2+1 \\ Charles R Greathouse IV, Jun 16 2017 CROSSREFS Sequence in context: A232265 A095653 A024135 * A133197 A287473 A240917 Adjacent sequences:  A050405 A050406 A050407 * A050409 A050410 A050411 KEYWORD easy,nonn AUTHOR Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 22 1999 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.