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

%I #6 Mar 30 2012 16:47:46

%S 1,11,10,121,220,100,1331,3630,3300,1000,14641,53240,72600,44000,

%T 10000,161051,732050,1331000,1210000,550000,100000,1771561,9663060,

%U 21961500,26620000,18150000,6600000,1000000,19487171,124009270

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