The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A160838 G.f.: (1+38*x+263*x^2+484*x^3+263*x^4+38*x^5+x^6)/(1-x)^7. 1
 1, 45, 557, 3473, 14417, 45965, 121997, 283137, 593281, 1147213, 2079309, 3573329, 5873297, 9295469, 14241389, 21212033, 30823041, 43821037, 61101037, 83724945, 112941137, 150205133, 197201357, 255865985, 328410881, 417348621, 525518605 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Source: the De Loera et al. article and the Haws website listed in A160747. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1). FORMULA a(n) = 68*n^6/45 +68*n^5/15 +91*n^4/9 +38*n^3/3 +467*n^2/45 +24*n/5 +1. - R. J. Mathar, Sep 11 2011 a(0)=1, a(1)=45, a(2)=557, a(3)=3473, a(4)=14417, a(5)=45965, a(6)=121997, a(n)=7*a(n-1)-21*a(n-2)+35*a(n-3)-35*a(n-4)+21*a(n-5)- 7*a(n-6)+a(n-7). -  Harvey P. Dale, Sep 17 2011 MATHEMATICA CoefficientList[Series[(1+38x+263x^2+484x^3+263x^4+38x^5+x^6)/(1-x)^7, {x, 0, 30}], x] (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {1, 45, 557, 3473, 14417, 45965, 121997}, 30] (* Harvey P. Dale, Sep 17 2011 *) PROG (MAGMA) [68*n^6/45 +68*n^5/15 +91*n^4/9 +38*n^3/3 +467*n^2/45 +24*n/5 +1: n in [0..30]]; // Vincenzo Librandi, Sep 19 2011 (PARI) x='x+O('x^30); Vec((1+38*x+263*x^2+484*x^3+263*x^4+38*x^5+x^6)/(1-x)^7) \\ G. C. Greubel, Apr 28 2018 CROSSREFS Sequence in context: A147842 A027783 A160837 * A189350 A090024 A282767 Adjacent sequences:  A160835 A160836 A160837 * A160839 A160840 A160841 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Nov 18 2009 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 18 05:01 EDT 2021. Contains 343994 sequences. (Running on oeis4.)