%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_.