Search: id:A119259
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%I A119259
%S A119259 1,3,17,111,769,5503,40193,297727,2228225,16807935,127574017
%N A119259 Central terms of the triangle in A119258.
%C A119259 a(n) = A119258(2*n,n).
%F A119259 a(n)=sum{k=0..n, C(2n,k)*C(2n-k-1,n-k)};. - Paul Barry (pbarry(AT)wit.ie), 
               Sep 28 2007
%F A119259 a(n)=sum{k=0..n, C(n+k-1,k)2^k}; - Paul Barry (pbarry(AT)wit.ie), Sep 
               28 2007
%Y A119259 Cf. A005408, A056220, A000225, A000337, A055580, A027608.
%Y A119259 Sequence in context: A123772 A103730 A074556 this_sequence A131204 A112111 
               A074554
%Y A119259 Adjacent sequences: A119256 A119257 A119258 this_sequence A119260 A119261 
               A119262
%K A119259 nonn
%O A119259 0,2
%A A119259 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 11 2006

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