%I #5 Mar 30 2012 16:47:46
%S 1,3,12,9,72,144,27,324,1296,1728,81,1296,7776,20736,20736,243,4860,
%T 38880,155520,311040,248832,729,17496,174960,933120,2799360,4478976,
%U 2985984,2187,61236,734832,4898880,19595520,47029248,62705664
%N Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*12^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_.