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adjacent
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Homework Statement
I have two questions
1.Today,in my test paper,I got this sequence. Find the nth term formula
1,3,15,61,253
I didn't know how to start.This is clearly not an arithmetic or geometric sequence.
Any help?
2. And is there any formula for finding the nth term of sequences with multiple level?
What I mean as multiple level here is this.
2,4,6,8,10 below the sequence is the difference between two numbers.
1. 2 2 2 2
This is a first level sequence.
2,4,8,14,22
1. 2 4 6 8
2. 2 2 2
This is a 2nd level sequence.
Is there any formula for finding the nth term of n level sequences?
Homework Equations
a+d(n-1)
ar(n-1)
The Attempt at a Solution
I really don't know
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