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%I #48 Sep 08 2022 08:45:59
%S 14,29,59,119,239,479,959,1919,3839,7679,15359,30719,61439,122879,
%T 245759,491519,983039,1966079,3932159,7864319,15728639,31457279,
%U 62914559,125829119,251658239,503316479,1006632959,2013265919,4026531839,8053063679,16106127359
%N a(n) = 15*2^n - 1.
%C Primes of this sequence are in A196940.
%H Vincenzo Librandi, <a href="/A196305/b196305.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (3,-2).
%F a(n) = 15*2^n - 1.
%F a(n) = A033484(n+1) + A083705(n).
%F From _Philippe Deléham_, Feb 17 2014: (Start)
%F a(n) = 2*a(n-1) + 1.
%F a(n) = 3*a(n-2) - 2*a(n-2). (End)
%F a(n) = A110286(n) - 1. - _Philippe Deléham_, Feb 17 2014
%o (Magma) [15*2^n -1 : n in [0..50]];
%o (PARI) a(n)=15<<n-1 \\ _Charles R Greathouse IV_, Oct 08 2011
%Y Cf. A033484, A083705, A110286 (first differences).
%K nonn,easy
%O 0,1
%A _Brad Clardy_, Oct 07 2011
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