OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..500
Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).
FORMULA
From G. C. Greubel, May 11 2017: (Start)
G.f.: (1 - 7*x - 42*x^2 - 322*x^3 - 287*x^4 - 63*x^5)/(1 - x)^7.
E.g.f.: (1 - x - 31*x^2 - 90*x^3 - 65*x^4 - 15*x^5 - x^6)*exp(x). (End)
Sum_{k>=2} -1/a(k) = 11/12 - Pi*tanh(sqrt(3)*Pi/2)/(2*sqrt(3)) = A339529. - Vaclav Kotesovec, Dec 08 2020
MATHEMATICA
Table[1-n^6, {n, 0, 40}] (* Vladimir Joseph Stephan Orlovsky, Apr 15 2011 *)
PROG
(Magma) [1-n^6: n in [0..50]]; // Vincenzo Librandi, Apr 29 2011
(Haskell)
a024004 = (1 -) . (^ 6) -- Reinhard Zumkeller, Mar 11 2014
(PARI) for(n=0, 50, print1(1-n^6, ", ")) \\ G. C. Greubel, May 11 2017
CROSSREFS
KEYWORD
sign,easy
AUTHOR
N. J. A. Sloane, corrected Mar 01 2007
STATUS
approved