Solve Tricky Sequence: 1,2,3,4,5,8,7,16,9

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SUMMARY

The sequence 1,2,3,4,5,8,7,16,9 follows a specific rule where odd numbers remain unchanged while even numbers are replaced by their corresponding powers of 2. For example, 2 is replaced by 21, 4 by 22, and 8 by 24. The next six terms in the sequence are 32, 11, 64, 13, 128, and 15, continuing this established pattern. This logic provides a clear method for generating further terms in the sequence.

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The sequence is 1,2,3,4,5,8,7,16,9

I am absolutely stumped and cannot fathom the answer. Normally I can see the logic, can anyone help with the rule?

Thank you
 
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Angthomas said:
The sequence is 1,2,3,4,5,8,7,16,9

I am absolutely stumped and cannot fathom the answer. Normally I can see the logic, can anyone help with the rule?

Thank you

Can you provide more terms? :smile:

Alright, here's my guess...the next 6 terms are 32, 11, 64, 13, 128, 15

The sequence is the positive integers. The odd numbers remain unchanged, the even numbers are replaced by powers of 2

2 is replaced by 2^1

4 is replaced by 2^2

6 is replaced by 2^3

8 is replaced by 2^4 You get the idea? :smile:
 
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