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1+12+16+112+120+…= ?1 + \frac {1}{\color{#3D99F6}2} + \frac {1}{\color{#3D99F6}6} + \frac {1}{\color{#3D99F6}{12}} + \frac {1}{\color{#3D99F6}{20}} + \ldots = \ \color{teal}? 1+21+61+121+201+…= ?
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