1, 3, 6, 10, 15, 21 f. 729, 243,81, 27,9 g. 1,3,2,4,3,5,4​

1, 3, 6, 10, 15, 21
f.
729, 243,81, 27,9
g. 1,3,2,4,3,5,4​

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