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Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*5^j.
0

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

%S 1,11,5,121,110,25,1331,1815,825,125,14641,26620,18150,5500,625,

%T 161051,366025,332750,151250,34375,3125,1771561,4831530,5490375,

%U 3327500,1134375,206250,15625,19487171,62004635,84551775,64054375

%N Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*5^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_.