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A024080 a(n) = 7^n - n^5. 2

%I

%S 1,6,17,100,1377,13682,109873,806736,5732033,40294558,282375249,

%T 1977165692,13841038369,96888639114,678222535025,4747560750568,

%U 33232929521025,232630512567350,1628413596020881,11398895182897044

%N a(n) = 7^n - n^5.

%H Vincenzo Librandi, <a href="/A024080/b024080.txt">Table of n, a(n) for n = 0..500</a>

%F From _Chai Wah Wu_, Jul 10 2016: (Start)

%F a(n) = 13*a(n-1) - 57*a(n-2) + 125*a(n-3) - 155*a(n-4) + 111*a(n-5) - 43*a(n-6) + 7*a(n-7) for n > 6.

%F G.f.: (-8*x^6 - 175*x^5 - 451*x^4 - 96*x^3 + 4*x^2 + 7*x - 1)/((x - 1)^6*(7*x - 1)). (End)

%o (MAGMA) [7^n-n^5: n in [0..25]]; // _Vincenzo Librandi_, Jul 03 2011

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_

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Last modified November 30 08:16 EST 2021. Contains 349419 sequences. (Running on oeis4.)