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Triangle of coefficients in expansion of (2+7x)^n.
0

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

%S 1,2,7,4,28,49,8,84,294,343,16,224,1176,2744,2401,32,560,3920,13720,

%T 24010,16807,64,1344,11760,54880,144060,201684,117649,128,3136,32928,

%U 192080,672280,1411788,1647086,823543,256,7168,87808,614656

%N Triangle of coefficients in expansion of (2+7x)^n.

%F G.f.: 1 / [1 - x(2+7y)].

%K tabl,nonn,easy

%O 0,2

%A _N. J. A. Sloane_.