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Central column (even terms a(2*n,n)) of A059922.
1

%I #3 Mar 30 2012 16:49:03

%S 1,2,10,1682,120057399050,2647928126185116317725365841617509110202,

%T 255789488733925851648062359817182405921531524373868836229124342967857050792404036741709821164704443818848164235229369262826826092463167079882026

%N Central column (even terms a(2*n,n)) of A059922.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Feb 09 2001