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 A196305 15*2^n - 1. 2
 14, 29, 59, 119, 239, 479, 959, 1919, 3839, 7679, 15359, 30719, 61439, 122879, 245759, 491519, 983039, 1966079, 3932159, 7864319, 15728639, 31457279, 62914559, 125829119, 251658239, 503316479, 1006632959, 2013265919, 4026531839, 8053063679, 16106127359 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Primes of this sequence are in A196940. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (3,-2). FORMULA a(n) = 15*2^n - 1. a(n) = A033484(n+1)+A083705(n). a(n) = 2*a(n-1)+1. a(n)=3*a(n-2)-2*a(n-2). - Philippe Deléham, Feb 17 2014 a(n) = A110286(n)-1. Philippe Deléham, Feb 17 2014 PROG (MAGMA) [15*2^n -1 : n in [0..50]]; (PARI) a(n)=15<

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