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I want to graph a sequence g[n]. I tried:

{g[n_] := FindSequenceFunction[{5, 11, 19, 29}, n]
Plot[g[n],n,1,99999]}

But it did not work.

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  • $\begingroup$ From this post it's hard to tell whether you had trouble finding the sequence, or plotting it. Consideration of that issue might lead to a better-formulated question, if not actual working code. $\endgroup$
    – Daniel Lichtblau
    Commented Sep 7, 2016 at 16:47

1 Answer 1

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You forgot parentheses in the second argument of Plot:

g[n_] = FindSequenceFunction[{5, 11, 19, 29}, n] ;
Plot[g[n], {n, 1, 99999}]

Notice that I changed := to = such that the sequence function is found once, rather than every single time that Plot wants to evaluate g at a new sample point.

In order to plot for natural numbers only, use

DiscretePlot[g[n], {n, 1, 49}]
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  • $\begingroup$ how to restrict domain to natural numbers. $\endgroup$
    – Theodor
    Commented Sep 7, 2016 at 16:48
  • $\begingroup$ @Theodor I edited the answer $\endgroup$
    – Coolwater
    Commented Sep 7, 2016 at 16:54
  • $\begingroup$ or ListPlot[g[n] /. n -> Range[20]] $\endgroup$
    – bill s
    Commented Sep 7, 2016 at 18:03

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