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Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*3^j.
0

%I #10 Apr 21 2017 20:14:24

%S 1,5,3,25,30,9,125,225,135,27,625,1500,1350,540,81,3125,9375,11250,

%T 6750,2025,243,15625,56250,84375,67500,30375,7290,729,78125,328125,

%U 590625,590625,354375,127575,25515,2187,390625,1875000,3937500

%N Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*3^j.

%C Row-reversed A013622. - _R. J. Mathar_, Dec 21 2011

%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 - 5*x - 3*x*y). - _Ilya Gutkovskiy_, Apr 21 2017

%e 1;

%e 5,3;

%e 25,30,9;

%e 125,225,135,27;

%K nonn,tabl,easy

%O 0,2

%A _N. J. A. Sloane_.