%I #5 Mar 30 2012 16:47:46

%S 1,9,6,81,108,36,729,1458,972,216,6561,17496,17496,7776,1296,59049,

%T 196830,262440,174960,58320,7776,531441,2125764,3542940,3149280,

%U 1574640,419904,46656,4782969,22320522,44641044,49601160,33067440

%N Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*6^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_.