147.
Fit the quintic equation:
t(n) = (19n5 - 275n4 + 1475n3 - 3505n2 + 3606n - 840)/120 for n = 1 , 2, 3, ...
12
The answer is: 12.
The next number in the series is 38. Take a look at the pairs of numbers:6 and 127 and 1411 and 2219 and ____The pattern rule is that each second number is twice the size as the first number. 6*2=12, 7*2=14, 11*2=22.Knowing this, double 19. 19*2=38.
18
20
18
20
It could be 62.
20
1833
20
78