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Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*6^j.
0

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

%S 1,5,6,25,60,36,125,450,540,216,625,3000,5400,4320,1296,3125,18750,

%T 45000,54000,32400,7776,15625,112500,337500,540000,486000,233280,

%U 46656,78125,656250,2362500,4725000,5670000,4082400,1632960,279936

%N Triangle whose (i,j)-th entry is binomial(i,j)*5^(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_.