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Writing it as:

1, 4, 9, 1 6, 2 5, 3 6, 4 9, 6 4, 8 1, ...

Should help you spot it is the digits of the square numbers written out in order.

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12y ago

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More answers

These are perfect squares: 1² = 1; 2² = 4; 3² = 9; 4² = 16; etc.

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14y ago
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Q: What pattern use for 1 4 9 16?
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