To identify an integer sequence try the Online Encyclopedia of Integer Sequences
Simply type in your sequence and choose Search.

Encyclopedia of Integer Sequences

Note that you can list, graph or even listen to the sequence!

There are more pages available, try Puzzles for some unusual sequences. Some of these are fun to try with students, try the eban sequence: 2, 4, 6, 30, 32, 34, 36, 40, 42, 44, 46, ….

Alternatively simply type the sequence into Wolfram Alpha.
WolframAlpha Seqences

Typing ‘Sequences’ into WolframAlpha shows several possibilities for queries on sequences.

For more on WolframAlpha see the WolframAlpha pages.

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