Question Number 20187 by naziri1920@gmail.com last updated on 23/Aug/17
$${t}_{{n}} =\frac{{t}_{{n}−\mathrm{1}} }{{n}^{\mathrm{2}} },\:{t}_{\mathrm{1}} =\mathrm{3};{t}_{\mathrm{2}} ,{t}_{\mathrm{3}} ,\left({n}\geqslant\mathrm{2}\right) \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$
Commented by Tinkutara last updated on 23/Aug/17
$${t}_{\mathrm{2}} \:=\:\frac{{t}_{\mathrm{1}} }{\mathrm{4}}\:=\:\frac{\mathrm{3}}{\mathrm{4}} \\ $$$${t}_{\mathrm{3}} \:=\:\frac{{t}_{\mathrm{2}} }{\mathrm{9}}\:=\:\frac{\mathrm{1}}{\mathrm{12}} \\ $$