There are many possible answers because there are many ways of generating the sequence.
One such is the cubic equation,
Un = (4n3 - 19n2 + 33n - 16)/2 for n = 1, 2, 3, ...
So U5 = 87.
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The rule is: "To get the next term, double this term and subtract 2."(66 x 2) - 2 = 130 comes next
The differences between the pairs of numbers up to that point are 31, 32, 33, 34. If the difference between the fifth number and the sixth number is equal to 35, that would make the next number equal to 122 + 243 = 265.
To convert 34.3 into a mixed number, we first need to separate the whole number part from the decimal part. The whole number part is 34, and the decimal part is 0.3. To express this as a mixed number, we write it as 34 3/10, where the whole number is 34 and the fraction represents the decimal part converted to tenths.
This is a Fibonacci sequence with alternate terms omitted. The first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two. (0),1,(1),2,(3),5,(8),13,(21),34,(55),89 The bracketed terms are the omitted terms. The next number would thus be 89