OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
FORMULA
G.f.: -256*(1 + 76*x + 230*x^2 + 76*x^3 + x^4)/(x-1)^5. - R. J. Mathar, May 08 2015
From Amiram Eldar, Apr 25 2023: (Start)
a(n) = A017113(n)^4.
Sum_{n>=0} 1/a(n) = Pi^4/24576. (End)
MATHEMATICA
(8*Range[0, 20]+4)^4 (* or *) LinearRecurrence[{5, -10, 10, -5, 1}, {256, 20736, 160000, 614656, 1679616}, 20] (* Harvey P. Dale, Aug 05 2019 *)
PROG
(Magma) [(8*n+4)^4: n in [0..35] ]; // Vincenzo Librandi, Jul 21 2011
KEYWORD
nonn,easy
AUTHOR
STATUS
approved