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A206372 14*4^n - 1. 1

%I

%S 13,55,223,895,3583,14335,57343,229375,917503,3670015,14680063,

%T 58720255,234881023,939524095,3758096383,15032385535,60129542143,

%U 240518168575,962072674303,3848290697215,15393162788863,61572651155455,246290604621823,985162418487295

%N 14*4^n - 1.

%F a(n) = 14*4^n - 1.

%F a(n) = (A199207(n+1) -3)/2 for n>=0.

%o (MAGMA) [14*4^n-1 : n in [0..30]];

%o (PARI) a(n)=14*4^n - 1 \\ _Charles R Greathouse IV_, May 05 2014

%Y Cf. A199207.

%K nonn,easy

%O 0,1

%A _Brad Clardy_, Feb 07 2012

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Last modified February 17 21:12 EST 2018. Contains 299297 sequences. (Running on oeis4.)