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%I #24 Jan 15 2023 09:52:44
%S 1,8,99,1030,9605,84036,705895,5764802,46118409,363182464,2824752491,
%T 21750594174,166095446413,1259557135292,9495123019887,71213422649146,
%U 531726889113617,3954718737782520,29311444762388083,216579008522089718
%N a(n) = n*7^n + 1.
%H Vincenzo Librandi, <a href="/A050919/b050919.txt">Table of n, a(n) for n = 0..1000</a>
%H Paul Leyland, <a href="http://www.leyland.vispa.com/numth/factorization/cullen_woodall/cw.htm">Factors of Cullen and Woodall numbers</a>
%H Paul Leyland, <a href="http://www.leyland.vispa.com/numth/factorization/cullen_woodall/gcw.htm">Generalized Cullen and Woodall numbers</a>
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (15,-63,49).
%F G.f.: -(42*x^2 - 7*x + 1)/((x-1)*(7*x-1)^2). [_Colin Barker_, Oct 14 2012]
%t Table[n*7^n+1,{n,0,20}] (* or *) LinearRecurrence[{15,-63,49},{1,8,99},20] (* _Harvey P. Dale_, Nov 23 2013 *)
%o (Magma) [ n*7^n+1: n in [0..20]]; // _Vincenzo Librandi_, Sep 16 2011
%Y Cf. A002064.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_, Dec 30 1999
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