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A013642 Numbers n such that continued fraction for sqrt(n) has period 2. +0
3
3, 6, 8, 11, 12, 15, 18, 20, 24, 27, 30, 35, 38, 39, 40, 42, 48, 51, 56, 63, 66, 68, 72, 80, 83, 84, 87, 90, 99, 102, 104, 105, 110, 120, 123, 132, 143, 146, 147, 148, 150, 152, 156, 168, 171, 182, 195, 198, 200, 203, 210, 224, 227, 228, 230, 231, 235, 240, 255, 258, 260, 264 (list; graph; listen)
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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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