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There are infinitely many polynomials of order 5 that will give these as the first five numbers and any one of these could be "the" rule. Short of reading the mind of the person who posed the question, there is no way of determining which of the infinitely many solutions is the "correct" one.
A rule, based on a polynomial of order 4 is:U(n) = (35n^4 - 394n^3 + 1555n^2 - 2420n + 1284)/4 for n = 1, 2, 3, ...
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Which number comes next in this series 15 18 54 57 171?
174 =============== 18 = 15+3 54 = 18x3 57 = 54+3 171= 57x3 174= 171+3
What is the next number in the sequence 18 15 5 39 36?
The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.
What number comes next in the sequence 6 12 9 18 15?
6 12 9 18 15 30 27 54 51
15 18 54 57 171?
the next two are 174 and 522.
Which numbers comes next in a series 15 18 54 57 171?
The pattern is add three and then multiply by three. The next number is 174.
Which number comes next in this series 15 18 54 57 171?
174 =============== 18 = 15+3 54 = 18x3 57 = 54+3 171= 57x3 174= 171+3
What is the next number in the sequence 18 15 5 39 36?
The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.
Add 2 to 171 to make it less than 18?
2 + 171=173 1 + 7 + 3 = 11 < 18
What number should come next in the following sequence 18 21 17 20 16 19 15?
18
What number comes next in the sequence 6 12 9 18 15?
6 12 9 18 15 30 27 54 51
What number comes next 10 5 8 20 15 18 30?
The next number in the sequence would be 25.
15 18 54 57 171?
the next two are 174 and 522.
What is the missing number in this sequence 17-23- -18-20-25-21-9-15-16?
22
Which numbers comes next in a series 15 18 54 57 171?
The pattern is add three and then multiply by three. The next number is 174.
1 plus 2 plus 3 plus ... equals 171?
The final number in this sum would be 18: 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 = 171
What number is next in this sequence 3 4 6 9 13?
The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.
What number best completes the sequence 10 8 7 14 15 13 12 24 25?
What number best completes the sequence 1 1/2 5 10 1/2 18
