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Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*2^j.
0

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

%S 1,11,2,121,44,4,1331,726,132,8,14641,10648,2904,352,16,161051,146410,

%T 53240,9680,880,32,1771561,1932612,878460,212960,29040,2112,64,

%U 19487171,24801854,13528284,4099480,745360,81312,4928,128,214358881

%N Triangle whose (i,j)-th entry is binomial(i,j)*11^(i-j)*2^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_.