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Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*11^j.
0

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

%S 1,10,11,100,220,121,1000,3300,3630,1331,10000,44000,72600,53240,

%T 14641,100000,550000,1210000,1331000,732050,161051,1000000,6600000,

%U 18150000,26620000,21961500,9663060,1771561,10000000,77000000,254100000

%N Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*11^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_.