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a(n) = floor(sinh(n)).
4

%I #17 Mar 04 2016 11:21:00

%S 0,1,3,10,27,74,201,548,1490,4051,11013,29937,81377,221206,601302,

%T 1634508,4443055,12077476,32829984,89241150,242582597,659407867,

%U 1792456423,4872401723,13244561064,36002449668,97864804714,266024120300,723128532145,1965667148572

%N a(n) = floor(sinh(n)).

%H T. D. Noe, <a href="/A000471/b000471.txt">Table of n, a(n) for n = 0..200</a>

%F a(n) = floor(e^n/2). - _Bruno Berselli_, Mar 04 2016

%t Table[Floor[Sinh[n]], {n, 0, 50}] (* _Stefan Steinerberger_, Apr 15 2006 *)

%t Table[Floor[E^n/2], {n, 0, 30}] (* _Bruno Berselli_, Mar 04 2016 *)

%Y Cf. A000501, A001113.

%K nonn

%O 0,3

%A _Simon Plouffe_

%E More terms from _Stefan Steinerberger_, Apr 15 2006