Expansion of sin(log(1+x)^2)/2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =11a(5) =-50a(6) =214a(7) =-504a(8) =-6252a(9) =162576a(10) =-2754684a(11) =42663060a(12) =-650722260a(13) =10034523720a(14) =-158078985000