2,4,8,16,32,64,128....
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A numerical sequence is a set of ordered numbers. That is all! For example, stochastic sequences are random.
arithmetic sequence. for example: 4,8,12,16 is an arithmetic sequence because it is 4+4+4+4. hope this helps!
It is any sequence of numbers. For example: 1 3 5 7 9 11 .... - this is the sequence of odd numbers. 1 4 65 4556 4 3 76 ... - this is probably not a special sequence at all.
"A shark peeling a banana before eating it" is a non example - of most anything!