Best Answer

Here is one way to describe this sequence:

a(0)=1

a(n) = 3*a(n-1) + 2 a(n) = 2*3^n - 1

So we have:

1, 5, 17, 53, 161, 485, 1457, 4373, 13121, 39365, 118097, 354293, 1062881, 3188645, 9565937, 28697813, 86093441, ...

Q: The number which best completes the sequence below is1 5 17 53 161?

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The number which best completes the sequence below is:2 9 5 13 10 19 17?

We can't answer this accurately without knowing the sequence.

77040

The number which best completes the sequence below is 20 5 30 6 42 7

5

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The number which best completes the sequence below is:2 9 5 13 10 19 17?

The number which best completes the sequence below is: 2 9 5 13 10 19 17 ?

The number which best completes the sequence below is:1 1 3 2 4 6 5 25 ?

We can't answer this accurately without knowing the sequence.

7

77040

== ==

27. But that continues the sequence, it does not complete it.

27

25

It is: 10-3 = 7

The number which best completes the sequence below is 20 5 30 6 42 7