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!)
 A152110 G.f.: -2*(-2 - 11*x - 4*x^2 + x^3)/(x - 1)^4. 2
 4, 38, 136, 330, 652, 1134, 1808, 2706, 3860, 5302, 7064, 9178, 11676, 14590, 17952, 21794, 26148, 31046, 36520, 42602, 49324, 56718, 64816, 73650, 83252, 93654, 104888, 116986, 129980, 143902, 158784, 174658, 191556, 209510, 228552, 248714 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 FORMULA a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4). a(n) = 2*(n+1)*(8*n^2 + 8*n + 3)/3 = A152133(2*n-1). - R. J. Mathar, Sep 22 2009 MATHEMATICA CoefficientList[Series[-2*(-2 - 11*x - 4*x^2 + x^3)/(x - 1)^4, {x, 0, 40}], x] (* Vincenzo Librandi, Dec 11 2012 *) PROG (MAGMA) I:=[4, 38, 136, 330]; [n le 4 select I[n] else 4*Self(n-1)-6*Self(n-2)+4*Self(n-3)-Self(n-4): n in [1..40]]; // Vincenzo Librandi, Dec 11 2012 CROSSREFS Cf. A006071. Sequence in context: A265437 A003633 A129310 * A209486 A245129 A196851 Adjacent sequences:  A152107 A152108 A152109 * A152111 A152112 A152113 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Sep 21 2009, based on email from R. J. Mathar, Mar 22 2009 EXTENSIONS More terms from R. J. Mathar, Sep 22 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 April 12 19:50 EDT 2021. Contains 342932 sequences. (Running on oeis4.)