from IPython.display import YouTubeVideo
YouTubeVideo("JWl4ZPrb5Ag")
def icosa_series(freq):
if freq == 0:
return 1
return 10 * freq ** 2 + 2
print([icosa_series(n) for n in range(10)])
[1, 12, 42, 92, 162, 252, 362, 492, 642, 812]