%I #14 Oct 15 2016 08:33:36

%S 0,8,142,2208,16412,78160,279978,823592,2097208,4783032,10000070,

%T 19487248,35831892,62748608,105413602,170859480,268435568,410338792,

%U 612220158,893871872,1280000140,1801088688,2494358042

%N a(n) = n^7 + 7*n.

%H <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (8,-28,56,-70,56,-28,8,-1).

%F From _Chai Wah Wu_, Oct 15 2016: (Start)

%F a(n) = 8*a(n-1) - 28*a(n-2) + 56*a(n-3) - 70*a(n-4) + 56*a(n-5) - 28*a(n-6) + 8*a(n-7) - a(n-8) for n > 7.

%F G.f.: 2*x*(4*x^6 + 39*x^5 + 648*x^4 + 1138*x^3 + 648*x^2 + 39*x + 4)/(x - 1)^8. (End)

%t Table[n^7+7n,{n,0,30}] (* _Harvey P. Dale_, Sep 10 2010 *)

%Y Cf. A132411, A079908, A180354, A180355, A180356.

%K easy,nonn

%O 0,2

%A _Odimar Fabeny_, Aug 30 2010

%E First term corrected and additional terms from _Harvey P. Dale_, Sep 10 2010