Alexa wrote the first $16$ numbers of a sequence: \[1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10, 11, …\]Then she continued following the same pattern, until she had $2015$ numbers in total. What was the last number she wrote?
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Tags: algebra
Alexa wrote the first $16$ numbers of a sequence: \[1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 10, 10, 11, …\]Then she continued following the same pattern, until she had $2015$ numbers in total. What was the last number she wrote?