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%I #3 Mar 30 2012 18:36:58
%S 1,1,5,14,43,156,535,1956,7175,26418,98375,367176,1378022,5193625,
%T 19641164,74535167,283651169,1082274210,4139129734,15863315213,
%U 60913982404,234317240601,902804442380,3483620505111,13460665855850
%N Central terms of triangle A120898 (cascadence of 1+2x+x^2).
%Y Cf. A120898, A120899, A120900, A120902.
%K nonn
%O 0,3
%A _Paul D. Hanna_, Jul 14 2006
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