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No First-Hand-Neighbors & Second-Hand-Neighbors!!!



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#1 BMAD

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Posted 06 July 2013 - 09:22 PM

Create the shortest possible sequence such that no number is next to its first-hand or second-hand neighbors (e.g., the number 3 cannot be next to numbers 1, 2, 4, or 5, which are first- and second- neighbors).

 

 

 


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#2 Nins_Leprechaun

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Posted 06 July 2013 - 10:46 PM   Best Answer

Spoiler for

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#3 BMAD

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Posted 06 July 2013 - 11:50 PM

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is a 5 sequence possible?


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#4 Nins_Leprechaun

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Posted 07 July 2013 - 01:12 AM


Spoiler for

is a 5 sequence possible?
No as there would be a number that could not be beside any other. For example in a sequence of numbers 1-5 the number 3 could not be beside any other number making a run of 5 (or less) impossible.
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#5 bonanova

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Posted 07 July 2013 - 06:09 AM

Spoiler for how about

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#6 BMAD

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Posted 07 July 2013 - 04:54 PM

i should have been more clear in the op, the sequence must start at 1 and go to some n greater than 1 (consecutively).


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