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Triangle of coefficients in expansion of (4+5x)^n.
0

%I #5 Mar 30 2012 16:45:53

%S 1,4,5,16,40,25,64,240,300,125,256,1280,2400,2000,625,1024,6400,16000,

%T 20000,12500,3125,4096,30720,96000,160000,150000,75000,15625,16384,

%U 143360,537600,1120000,1400000,1050000,437500,78125,65536

%N Triangle of coefficients in expansion of (4+5x)^n.

%F G.f.: 1 / [1 - x(4+5y)].

%K tabl,nonn,easy

%O 0,2

%A _N. J. A. Sloane_.