nikki2831 nikki2831

08-08-2016
Mathematics

contestada

what is the missing number for the sequel 1 2 5 10 13 blank

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dalendrk dalendrk

08-08-2016

{a: a∈N ∧ a = x² + y²} = {1, 2, 5, 10, 13, 17, ...}

Offset 1, 2

1² + 2² = 1 + 4 = 5
1² + 3² = 1 + 9 = 10
2² + 3² = 4 + 9 = 13
1² + 4² = 1 + 16 = 17

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