Verified Answer :

caylus

Hello,

You should have said that the sequence was arithmetic!!
(there are at least 225 results found.  at OEIS)


a(n)=3+(n-1)6
a(31)=3+306=189



Xadrea890

First you have to make a algebraic expression to go with the term to term number.

The algebraic expression that goes with this is X6+3

Term 1 from transfer to 9:1X6+3=9

Term 2 from transfer to 15:2X6+3=15

Term 3 from transfer to 21:3X6+3=21

So, 31X6+3= 189 

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