a(n) = [x^n] eta(x)^(2^n).A158112a(n) = [x^n] eta(x)^(2^n).Terms a(0) =1a(1) =-2a(2) =2a(3) =0a(4) =260a(5) =-72384a(6) =40618368a(7) =-64586112000External referencesoeis: A158112