Question 1080745
Below is the animation depicting all eleven graphs shown one at a time. Please be patient to let the animation load and cycle through. 


Take note of the slider up at the top right. As the slider moves, the equation and corresponding graph changes. 
<img src = "https://i.imgur.com/GZJCIFs.gif">
Images and gif generated by <a href = "https://www.geogebra.org/home">GeoGebra</a> (free graphing software).



The heart shape occurs when n = -4 or n = -5 while the bell shape happens when n = 4 or n = 5. So it appears that the two shapes occur at the opposite ends of this interval [-5, 5].