General Information About OEISMost people use the OEIS to get information about a particular number sequence. If you are a new visitor, then you might ask the database if it can recognize your favorite sequence, if you have one. To do this, go to the main look-up page, enter the sequence, and click Submit. You could also look for your sequence in the Index.You might also look at the demonstration pages to see more examples of how to use the OEIS.If your favorite sequence isn't in the database, and if it is interesting, please submit it using the web page for Contributing a new sequence or comment. Of course the sequence should be well-defined, of general interest and ideally it should be infinite. Short sequences such as phone numbers are not appropriate. Before submitting a new sequence, you must first register.If you have stumped the database, you can try Superseeker, which tries really hard to identify a sequence. Send an empty email message to email@example.com to get instructions.You can browse the database, using the WebCam. This can be set to look at the most interesting sequences, recent additions, or sequences needing more terms. It can be quite addictive!It is also interesting to browse the Index to the OEIS to see the variety of topics that are covered. In a way the OEIS can be regarded as an index to all of science. It is like a dictionary or fingerprint file for number sequences.
Helena Capela's insight:
Nem sabia que havia uma enciclopédia de sequências!