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!)
 A197602 Floor((n+1/n)^3). 6
 8, 15, 37, 76, 140, 234, 364, 536, 756, 1030, 1364, 1764, 2236, 2786, 3420, 4144, 4964, 5886, 6916, 8060, 9324, 10714, 12236, 13896, 15700, 17654, 19764, 22036, 24476, 27090, 29884, 32864, 36036, 39406, 42980, 46764, 50764, 54986, 59436, 64120, 69044, 74214, 79636, 85316, 91260, 97474, 103964, 110736, 117796, 125150 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..10000 Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1). FORMULA Contribution from Bruno Berselli, Oct 17 2011:  (Start) G.f.: x*(8-17*x+25*x^2-14*x^3+6*x^4-3*x^5+x^6)/(1-x)^4. a(n) = 4*a(n-1)-6*a(n-2)+4*a(n-3)-a(n-4) for n>7. a(n) = A079908(n) for n>3. (End) PROG (MAGMA) [Floor((n+1/n)^3): n in [1..60]] (PARI) a(n)=n^3+3*n+(3*n^2+1)\n^3 \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Cf. A079908, A014052. Sequence in context: A089954 A134020 A343141 * A306599 A226151 A253767 Adjacent sequences:  A197599 A197600 A197601 * A197603 A197604 A197605 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Oct 17 2011 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 July 30 00:57 EDT 2021. Contains 346346 sequences. (Running on oeis4.)