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November 15th, 2014, 02:02 PM | #11 |
Senior Member Joined: Jan 2014 From: The backwoods of Northern Ontario Posts: 390 Thanks: 70 |
How about the following sequence? 3,3,9,5,16,7,25,9,36,11,49,13... |
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November 15th, 2014, 02:12 PM | #12 |
Math Team Joined: May 2013 From: The Astral plane Posts: 2,041 Thanks: 815 Math Focus: Wibbly wobbly timey-wimey stuff. | |
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November 15th, 2014, 07:26 PM | #13 |
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,961 Thanks: 991 | |
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November 15th, 2014, 09:23 PM | #14 |
Math Team Joined: Dec 2013 From: Colombia Posts: 7,599 Thanks: 2587 Math Focus: Mainly analysis and algebra | |
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November 16th, 2014, 02:30 PM | #15 |
Global Moderator Joined: Dec 2006 Posts: 20,285 Thanks: 1968 |
Interweaving 3, 9, 16, 24, 33, ... (differences: 6, 7, 8, 9, ...) with 3, 5, 6, 6, 5, ... (differences: 2, 1, 0, -1, ...) amounts to soroban's solution. If it's a decent problem, there's a simpler answer that I haven't found. |
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November 16th, 2014, 05:22 PM | #16 |
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,961 Thanks: 991 | |
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November 17th, 2014, 01:01 PM | #17 |
Senior Member Joined: Nov 2013 From: Baku Posts: 502 Thanks: 56 Math Focus: Geometry | |
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