Four？er coeff？c？ents of a class of ETA quot？ents of we？ght 20 w？th level 12

Williams and later Yao, Xia and Jin discovered explicit formulas for the coefficients of the Fourier series expansions of a class of eta quotients. Williams expressed all coefficients of 126 eta quotients in terms of σ(n),σ((n/2)),σ((n/3)) and σ((n/6)) and Yao, Xia and Jin, following the method of proof of Williams, expressed only even coefficients of 104 eta quotients in terms of σ？(n),σ？((n/2)),σ？((n/3)) and σ？((n/6)).Here, we will express the even Fourier coefficients of 570 eta quotients in terms of σ？？(n),σ？？((n/2)),σ？？((n/3)),σ？？((n/4)),σ？？((n/6)) and σ？？((n/(12))).