Possibly -218, using
Un = (-27n4 + 314n3 - 1260n2 + 2041n - 1026)/6 where n = 1, 2, 3, ...
24
what number comes next 1 -8 -16 -24 -33
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
the next answer would be 1,024
32
24
1. Each number is 1/2 of previous number.
16
what number comes next 1 -8 -16 -24 -33
16.
This is the series of square numbers, (16= 4*4). The next number is 5*5=25.
the next answer would be 1,024
625
481
32
32
24