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In5d number sequences8/10/2023 ![]() Plouffe's Encyclopedia of Integer Sequences (1995)Ĭontain much useful information about analyzing an unknown sequence and many other topics. Sloane's Handbook of Integer Sequences (1973) Introductory chapters from the 19 books Supplement 3 to 1973 book You might also like to see the list of papers that have acknowledged help from the database and some comments from readers.Also worth visiting are the pages dealing with Puzzle sequences, Classic sequences and Hot sequences.It is like a dictionary or fingerprint file for number sequences. In a way the OEIS can be regarded as an index to all of science. It is also interesting to browse the Index to the OEIS to see the variety of topics that are covered.This can be set to look at the most interesting sequences, recent additions, or sequences needing more terms. You can browse the database, using the WebCam.Send an empty email message to to get instructions. If you have stumped the database, you can try Superseeker, which tries really hard to identify a sequence.Before submitting a new sequence, you must first register. Short sequences such as phone numbers are not appropriate. Of course the sequence should be well-defined, of general interest and ideally it should be infinite. 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.You might also look at the demonstration pages to see more examples of how to use the OEIS.You could also look for your sequence in the Index. To do this, go to the main look-up page, enter the sequence, and click Search. If you are a new visitor, then you might ask the database if it can recognize your favorite sequence, if you have one. Most people use the OEIS to get information about a particular number sequence.The Mersenne primes, A000043 and A000668įor some other fascinating sequences see Pictures from the OEIS: The (Free) OEIS Store General Information About OEIS.Welcome to The On-Line Encyclopedia of Integer Sequences® (OEIS®) Wiki Some Famous SequencesĬlick on any of the following to see examples of famous sequences in the On-Line Encyclopedia of Integer Sequences (the OEIS), then hit "Back" in your browser to return here: 26 OEIS Mentioned in WolframAlpha Timeline.16 Email Addresses, Getting in Touch With Authors.14 Contributing a New Sequence, Comment or More Terms.11 Sequences Which Agree For a Long Time.9 Format Used in Replies From the Database.8 Arrangement of the Sequences in Database.5 Description of OEIS entries (or, What is the Next Term?).4 Introductory chapters from the 19 books Supplement 3 to 1973 book.1 Welcome to The On-Line Encyclopedia of Integer Sequences® (OEIS®) Wiki.
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