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There are infinitely many rules based on polynomials of order 5 such that the first five numbers are as listed in the question. There are also non-polynomial solutions. 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.
The simplest answer, based on a polynomial of order 2 (a quadratic) is
U(n) = (n^2 - n + 6)/2 for n = 1, 2, 3, ...
What else can I help you with?
What is the next number in this sequence 3 4 6 9 13?
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
What is the next number sequence for 3 4 6 9 13?
18
What is the number that completes the sequence 3 4 6 9 13?
18
Which number completes sequence 3 4 6 9 13?
18
What number comes next in this number sequence 3 4 6 9 13?
18. 3+1=4, 4+2=6, 6+3=9, 9+4=13, 13+5=18.
What is the rule for this sequence 3 4 6 9 13 18?
The rule for this sequence appears to be adding consecutive prime numbers. The sequence starts with 3, then adds the next prime number 2 to get 4. It then adds 3 (the next prime number) to 4 to get 7, then 5 to 7 to get 12, and so on. Each number in the sequence is the sum of the previous number and the next prime number in order.
What is the number that best completes this sequence 3 4 6 9 13?
18 (3+1 4+2 6+3 9+4 13+5)
The number that best completes the sequence 3 4 6 9 13?
18
What comes next in the number sequence 3 4 6 9 13?
18
Number sequence 3 4 6 9 13?
18 is the answer and here is why:- 3+1=4 4+2=6 6+3=9 9+4=13 13+5=18
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 below 3 4 6 9 13?
18 Add to previous number by 1 then 2 then 3 then 4 and 5 3+1=4 4+2=6 6+3=9 9+4=13 so then 13+5=18
