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a(n) = (10*n + 3)^7.
2

%I #17 Sep 08 2022 08:44:42

%S 2187,62748517,3404825447,42618442977,271818611107,1174711139837,

%T 3938980639167,11047398519097,27136050989627,60170087060757,

%U 122987386542487,235260548044817,425927596977747,736141813551277

%N a(n) = (10*n + 3)^7.

%H Vincenzo Librandi, <a href="/A017311/b017311.txt">Table of n, a(n) for n = 0..10000</a>

%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).

%t (10Range[0,20]+3)^7 (* or *) LinearRecurrence[{8,-28,56,-70,56,-28,8,-1},{2187,62748517,3404825447,42618442977,271818611107,1174711139837,3938980639167,11047398519097},20] (* _Harvey P. Dale_, Oct 02 2017 *)

%o (Magma) [(10*n+3)^7: n in [0..20]]; // _Vincenzo Librandi_, Jul 31 2011

%Y Cf. A272914, first comment. - _Bruno Berselli_, May 26 2016

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_