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Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*2^j.
0

%I #8 Apr 21 2017 20:12:18

%S 1,4,2,16,16,4,64,96,48,8,256,512,384,128,16,1024,2560,2560,1280,320,

%T 32,4096,12288,15360,10240,3840,768,64,16384,57344,86016,71680,35840,

%U 10752,1792,128,65536,262144,458752,458752,286720,114688

%N Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j)*2^j.

%H B. N. Cyvin et al., <a href="http://match.pmf.kg.ac.rs/electronic_versions/Match34/match34_109-121.pdf">Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons</a>, Match, No. 34 (Oct 1996), pp. 109-121.

%F G.f.: 1/(1 - 4*x - 2*x*y). - _Ilya Gutkovskiy_, Apr 21 2017

%K nonn,tabl,easy

%O 0,2

%A _N. J. A. Sloane_.