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Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*10^j.
0

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

%S 1,7,10,49,140,100,343,1470,2100,1000,2401,13720,29400,28000,10000,

%T 16807,120050,343000,490000,350000,100000,117649,1008420,3601500,

%U 6860000,7350000,4200000,1000000,823543,8235430,35294700,84035000

%N Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*10^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_.