OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (8,-28,56,-70,56,-28,8,-1).
FORMULA
O.g.f.: 128*x*(1 + 120*x + 1191*x^2 + 2416*x^3 + 1191*x^4 + 120*x^5 + x^6)/(1-x)^8. - R. J. Mathar, May 07 2008
From Amiram Eldar, Oct 10 2020: (Start)
Sum_{n>=1} 1/a(n) = zeta(7)/128.
Sum_{n>=1} (-1)^(n+1)/a(n) = 63*zeta(7)/8192. (End)
MAPLE
MATHEMATICA
(2*Range[0, 20])^7 (* Harvey P. Dale, Jan 17 2011 *)
PROG
(Magma) [(2*n)^7: n in [0..30]]; // Vincenzo Librandi, Sep 05 2011
(PARI) vector(30, n, n--; (2*n)^7) \\ G. C. Greubel, Sep 15 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved