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Palindromic sequences (Posted on 2005-10-31) Difficulty: 3 of 5
1,1
1,2,1
1,3,2,3,1
1,4,3,2,3,4,1
1,5,4,3,5,2,5,3,4,5,1
1,6,5,4,3,5,2,5,3,4,5,6,1

What are the next several lines and how are they formed?

Do the sequences have any special feature?

Does the pattern continue indefinitely?

See The Solution Submitted by Bob Smith    
Rating: 3.7143 (7 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts counting the number of numbers | Comment 5 of 16 |

the first thing i noticed was that each row had a prime number of elements

 2) 1-1
 3) 1-2-1
 5) 1-3-2-3-1
 7) 1-4-3-2-3-4-1
11) 1-5-4-3-5-2-5-3-4-5-1
 

  Posted by tanx on 2005-10-31 15:26:36
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