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In Part (Posted on 2005-07-19) Difficulty: 1 of 5
What does the following sequence represent?

1, 1, 3, 1, 5, 3, 7, 1, 9, 5, 11, 3, 13, 7, 15, 1, 17, 9, 19, 5, 21, 11, 23, 3, 25, 13, 27, 7, 29, 15, 31, 1.

See The Solution Submitted by Juggler    
Rating: 4.5000 (4 votes)

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Solution here goes the pattern! | Comment 7 of 9 |

we all noticed all numbers in the sequence is odd.

and the pattern are the following:

1st,

1, 1, 3, 1, 5, 3, 7, 1, 9, 5, 11, 3, 13, 7, 15, 1, 17, 9, 19, 5, 21, 11, 23, 3, 25, 13, 27, 7, 29, 15, 31, 1.

in (2n-1)th terms have the sequence of consecutive odd numbers.

2nd,

1, 1, 3, 1, 5, 3, 7, 1, 9, 5, 11, 3, 13, 7, 15, 1, 17, 9, 19, 5, 21, 11, 23, 3, 25, 13, 27, 7, 29, 15, 31, 1.

in (4n-2)th terms have also the sequence of consecutive odd numbers.

3rd,

1, 1, 3, 1, 5, 3, 7, 1, 9, 5, 11, 3, 13, 7, 15, 1, 17, 9, 19, 5, 21, 11, 23, 3, 25, 13, 27, 7, 29, 15, 31, 1.

in (8n-4)th terms have also the sequence of consecutive odd numbers.

in this 3 patterns of sequences, we conclude that [(2^k)n-(2^(k-1))]th terms where k = 1,2,3,...n starts with 1 followed by the next odd number 3 and so on to its preceeding term.

Edited on August 5, 2005, 9:13 am

Edited on August 6, 2005, 9:30 am
  Posted by nickson on 2005-08-05 09:11:30

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