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%I #5 Mar 30 2012 16:47:46
%S 1,7,2,49,28,4,343,294,84,8,2401,2744,1176,224,16,16807,24010,13720,
%T 3920,560,32,117649,201684,144060,54880,11760,1344,64,823543,1647086,
%U 1411788,672280,192080,32928,3136,128,5764801,13176688,13176688
%N Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*2^j.
%D B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121.
%K nonn,tabl,easy
%O 0,2
%A _N. J. A. Sloane_.
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