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Row sums of triangle A120894 (cascadence of 1+x+x^2).
4

%I #3 Mar 30 2012 18:36:58

%S 1,3,10,33,106,336,1056,3296,10234,31648,97551,299888,919865,2816291,

%T 8608712,26278538,80120533,244022331,742525242,2257527861,6858558246,

%U 20822959508,63181453350,191601205342,580749971840,1759465640586

%N Row sums of triangle A120894 (cascadence of 1+x+x^2).

%Y Cf. A120894, A120895, A120896.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Jul 14 2006