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Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*4^j.
0

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

%S 1,12,4,144,96,16,1728,1728,576,64,20736,27648,13824,3072,256,248832,

%T 414720,276480,92160,15360,1024,2985984,5971968,4976640,2211840,

%U 552960,73728,4096,35831808,83607552,83607552,46448640,15482880

%N Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*4^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_.