L = [1]
while True:
yield L
L = [1] + [L[n]+L[n+1] for n in range(len(L)-1)] + [1]
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Alice_Biggee
L = [1]
while True:
yield L
L = [1] + [L[n]+L[n+1] for n in range(len(L)-1)] + [1]