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a(n) = T(n,n+1) + T(n,n+2) + ... + T(n,2n), T given by A027082.
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%I #4 Mar 30 2012 18:56:14

%S 1,5,16,50,152,452,1331,3897,11378,33186,96791,282461,825013,2412157,

%T 7060154,20686324,60673102,178126774,523426827,1539393889,4530901919,

%U 13345545959,39335284312,116011722730,342354698603

%N a(n) = T(n,n+1) + T(n,n+2) + ... + T(n,2n), T given by A027082.

%K nonn

%O 0,2

%A _Clark Kimberling_