%I A005317 M1460
%S A005317 1,2,5,14,43,142,494,1780,6563,24566,92890,353740,1354126,5204396,20066492,
%T A005317 77575144,300572963,1166868646,4537698722,17672894044,68923788698,269129985796,
%U A005317 1052051579012,4116719558104,16123810230158,63205319996092,247959300028484
%N A005317 (2^n + C(2n,n))/2.
%C A005317 Hankel transform is A008619. - Paul Barry (pbarry(AT)wit.ie), Nov 13 
               2007
%D A005317 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%p A005317 f := n->(2^n+binomial(2*n,n))/2;
%Y A005317 Sequence in context: A066351 A029889 A123020 this_sequence A126566 A112808 
               A088927
%Y A005317 Adjacent sequences: A005314 A005315 A005316 this_sequence A005318 A005319 
               A005320
%K A005317 nonn,easy
%O A005317 0,2
%A A005317 N. J. A. Sloane (njas(AT)research.att.com) and Peter Fishburn.