![]() Sequences can be finite or infinite, such as the sequence of all even positive integers (2, 4, 6, …).When a symbol has been chosen for denoting a sequence, the nth element of the sequence is denoted by this symbol with n as a subscript for example, the nth element of the Fibonacci sequence is generally denoted F n. ![]() It depends on the context or of a specific convention if the first element has index 0 or 1.
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