The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #4 Mar 30 2012 18:56:53
%S 1,3,9,33,115,401,1482,5449,20048,75303,283599,1069860,4070772,
%T 15539326,59433763,228278533,879053987,3391075968,13113667186,
%U 50808921375,197150760045,766241841810,2982295208876,11621280655944
%N T(n,n+2), array T as in A047110.
%K nonn
%O 0,2
%A _Clark Kimberling_