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Sum[k=1..n, T(k,n-k+1)], where T is array A094718.
1

%I #2 Apr 30 2014 01:30:10

%S 1,2,4,6,11,16,29,43,78,119,217,340,624,1000,1847,3015,5602,9282,

%T 17341,29084,54605,92512,174455,298110,564332,971562,1845363,3198129,

%U 6092037,10621152,20282470,35554558,68042536,119874493,229840129

%N Sum[k=1..n, T(k,n-k+1)], where T is array A094718.

%K nonn

%O 1,2

%A _Ralf Stephan_, May 23 2004