Expansion of tan(sin(x)^2)/2.A024264Expansion of tan(sin(x)^2)/2.Terms a(0) =0a(1) =1a(2) =-4a(3) =136a(4) =-6784a(5) =524416a(6) =-64036864a(7) =10501374976External referencesoeis: A024264