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There are many posible answers. One of them is

Un = (-n4 + 13n3 - 53n2 + 95n - 36)/6 for n = 1, 2, 3, ...

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12y ago

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Related Questions

What is the nth term for sequence 3 12 27 64 75 108?

There is no pattern


The number which best completes the sequence below is 1 12 5 10 12 18?

The sequence appears to alternate between adding and subtracting numbers. The pattern seems to be +11, -7, +5, -2, +6. Following this pattern, the next number in the sequence would be +3 from the previous number, which would be 21.


What number best completes the sequence 2 9 3 14 4 19?

13 20 12


What best answer completes this sequence 2 9 5 13 10 19 17?

Pattern: +7,-4,+8,-3,+9,-2... Pattern continuation: +10,-1,+11,*0,+12,+1 17+10=27


What is the next number in sequence 4 12 15 45 48?

The sequence reflects a pattern of multiplying by 3, then adding 3, to each successive value. The next value would be 144. Explanation: 4x3=12, 12+3=15, 15x3=45, 45+3=48, 48x3=144


What is the following pattern in the sequence 3 -6 12 4 20?

3, -6, 12, 4, 20, 13, 27, 21, 33 -9, +18, -8, +16, -7, +14, -6, +12


What is the fraction form of 3 is to 12 is to 4 in ratio?

3/19 : 12/19 : 4/19


What is the sequence of 361224?

If one may choose the break points, it looks like simple doubling: 3 - 6 - 12 - 24


What are the next two numbers in the pattern 1 3 7 13 19?

21 and 13. The pattern is t(n) = (-n4 + 10n3 - 23n2 + 38n - 12)/12


What is the next number in this pattern 3 4 7 8 11?

The pattern seems to be +1 +3 +1 +3 (3+1 = 4, 4+3 = 7, 7+1 = 8, etc...) So next in the sequence would be 12.


What is the pattern in the sequence 11 12 14 17 21?

The pattern in the sequence 11 12 14 17 21 is an increasing sequence where each number is the sum of the previous number and a specific value. In this case, the specific value is increasing by 1 with each subsequent number. So, starting from 11, we add 1 to get 12, then add 2 to get 14, add 3 to get 17, and add 4 to get 21.


What is the pattern rule for -3 and 6 and -9 and 12 and -15?

Each number is decreasing by 3. The next numbers in the sequence would be -18, -21, -24, -27, -30.