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  1. The On-Line Encyclopedia of Integer Sequences (OEIS) Enter a sequence, word, or sequence number: Hints Welcome Video. For more information about the Encyclopedia, see the Welcome page.

    • Welcome

      Welcome to The On-Line Encyclopedia of Integer Sequences®...

    • Contribute New Seq. Or Comment

      The On-Line Encyclopedia of Integer Sequences. IMPORTANT:...

    • Hints

      The 1086 is the number of sequences in the database that...

    • Index

      A highly selective Index to the On-Line Encyclopedia of...

    • WebCam

      (Greetings from The On-Line Encyclopedia of Integer...

    • More

      Sequences with keyword "more" usually need extending. (But...

    • The OEIS Community

      who helped NJAS set up the initial version of the On-Line...

    • Superseeker

      The first, sequences@oeis.org, does a simple look-up in the...

  2. 25 maj 2018 · The recent history of The On-Line Encyclopedia of Integer Sequences (or OEIS), describing developments since 2009, and discussing recent sequences involving interesting unsolved problems and in many cases spectacular illustrations.

  3. 24 gru 2003 · The On-Line Encyclopedia of Integer Sequences (or OEIS) is a database of some 130000 number sequences which serves as a dictionary, to tell the user what is known about a particular sequence and is widely used.

  4. The On-Line Encyclopedia of Integer Sequences. An illustrated guide with many unsolved problems. Neil J. A. Sloane, Math 640 Guest Lecture, Rutgers University, April 28 2022. Outline. OEIS Basics. Submitting, Editing, Rejecting, Comments. Gerrymandering. Facial Recognition and LES Sequences. Other Topics. OEIS Basics.

  5. In this note, we explore two families of sequences associated to a suitable integer sequence: the gap-sum sequence and the gap-product sequence. These are the sums and the products of consecutive numbers not in the original sequence.

  6. The On-Line Encyclopedia of Integer Sequences (or OEIS) is a database of some 130000 number sequences. It is freely avail-able on the Web (http://www.research.att.com/∼njas/sequences/) and is widely used. There are several ways in which it benefits research: 1. It serves as a dictionary, to tell the user what is known about a particular ...

  7. The On-Line Encyclopedia of Integer Sequences. FOUNDED IN 1964 BY N. J. A. SLOANE. REVIEWED BY STEVEN FINCH. A Tribute to John Horton Conway. he On-Line Encyclopedia of Integer Sequences T (OEIS) is a triumph, residing at the intersection of mathematics and technology, and appealing to specialists and novices alike.

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