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Math Help - Find a simple formula defining the nth term of the sequence

  1. #1
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    Find a simple formula defining the nth term of the sequence

    So stuck on this!

    0, 1, 3, 8, 15...... that's the sequence.

    I've got (n-1)^2 - 1 as a kind of answer, it's a bit off as it gives -1, 0, 3, 8, 15.

    Any ideas?
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  2. #2
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  3. #3
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    Hey, thanks for the page but I can't understand it because there's too much going on.... where can I find the answer to my question?
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  4. #4
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    That page lists all the sequences featuring 0, 1, 3, 8, 15 that occur in a very comprehensive list of sequences occurring in mathematics. None of them is given by a simple formula, and there does not seem to a natural formula that generates your sequence.

    If I had to guess, I would say that the "1" should not be in the sequence that you were given, and that your suggested answer n^2-1 (where n\geqslant1) is the one that was expected.
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  5. #5
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    Thanks for your answer. I did think of the n^2-1 previously, but obviously it's the closest it's gonna get. Thanks again!
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