Step 1:

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The sequence is \"\"

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Draw the table for n even natural numbers.

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\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
\"\"Sum of the first \"\" even natural numbers\"\"
\"\"\"\"\"\"
\"\"\"\" \

\"\"

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\"\"\"\" \

\"\"

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\"\"

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\"\" \

\"\"

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\"\"

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\"\"\"\"
\"\"\"\"\"\"
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\"\"

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\"\"\"\"
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\"\".

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Solution :

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\"\".