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%I #12 Jan 28 2014 10:12:36
%S 1,65,257,769,2049,5121,12289,28673,65537,147457,327681,720897,
%T 1572865,3407873,7340033,15728641,33554433,71303169,150994945,
%U 318767105,671088641,1409286145,2952790017,6174015489,12884901889,26843545601,55834574849,115964116993
%N 1 + (n-6)*2^(n-1).
%C Formula defining A115618 but with a typo.
%D R. J. Lang, Origami approximate geometric constructions, in Tribute to a Mathemagician, Peters, 2005, pp. 223-239.
%p A115342:=n->1 + (n - 6)*2^(n - 1); seq(A115342(n), n=6..40); # _Wesley Ivan Hurt_, Jan 23 2014
%t Table[1 + (n - 6)*2^(n - 1), {n, 6, 40}] (* _T. D. Noe_, Apr 01 2013 *)
%o (PARI) a(n) = 1 + (n-6)*2^(n-1) \\ _Michel Marcus_, Apr 01 2013
%Y Cf. A115618.
%K nonn
%O 6,2
%A _N. J. A. Sloane_, Apr 11 2006
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