There aren't enough starting numbers to figure out the pattern.
Or, more correctly, there are many patterns that could fit those starting numbers. The problem is, with this few starting numbers, we can't identify the one specific pattern that gives us these starting numbers.
Example:
10, -1, 0
Pattern: subtract 11, add 1, subtract 11, add 1
Result: 10, -1, 0, -11, -10, -21, -20, . . .
.
Example:
10, -1, 0
Pattern: divide by -10, add 1, divie by -10, add 1
Result: 10, -1, 0, 0, 1, -1/10, 9/10, -9/100, 91/100, . . .
.
Example:
10, -1, 0
Pattern: square the number and subtract 101, then add 1, then square the number and subtract 101, then add 1
Result: 10, -1, 0, -101, -100, -10101, -10100, . . .
.
All of these examples are patterns that generate 10, -1, 0, so all ofthese examples are accurate given 10, -1, 0 as a starting pattern