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Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*8^j.
0

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

%S 1,4,8,16,64,64,64,384,768,512,256,2048,6144,8192,4096,1024,10240,

%T 40960,81920,81920,32768,4096,49152,245760,655360,983040,786432,

%U 262144,16384,229376,1376256,4587520,9175040,11010048,7340032,2097152

%N Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*8^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_.