There seems to be no logical order to this set of numbers.
* * * * *
Or, you could try 78.
Fit the quartic polynomial
t(n) = (7n4 - 66n3 + 221n2 - 186n + 216)/24 for n = 1, 2, 3, ...
Chat with our AI personalities
18
108
29, assuming it is an algebraically reclusive sequence.
18-the correct number should be 20.
The series appears to be following a pattern where each number is the result of a mathematical operation on the previous numbers. In this case, the pattern seems to be adding consecutive odd numbers starting from 1. 1 + 8 = 9 9 + 9 = 18 18 + 7 = 25 25 + 2 = 27 27 - 6 = 21 Following this pattern, the next number in the series would be 21 + 1 = 22.