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Number Sequence Calculator

Arithmetic and geometric sequences.

Sequence

Nth term
29
a + (n−1)·d = 2 + 9·3
Sum
155
n/2 × (2a + (n−1)d)

First terms

2, 5, 8, 11, 14, 17, 20, 23, 26, 29

What's next

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Number Sequence Calculator · Generated 5/2/2026 · calccenter.online/calculators/math/number-sequence

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About the Number Sequence Calculator

MethodologyHome

Arithmetic and geometric sequences. Use this free number sequence calculator to get instant results. All calculations run in your browser — nothing is sent to a server.

Frequently asked questions

What does this Number Sequence Calculator do?

Arithmetic and geometric sequences.

Is it free?

Yes — every calculator on Calc Center is free, with no sign-up or account required.

Does it work offline?

The site is a Progressive Web App — after your first visit, most pages work without an internet connection.