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OEIS. The On-Line Encyclopedia of Integer Sequences (OEIS) , Enter a sequence, word, or sequence number: For more information...

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News, stories and media buzz related to OEIS

  • The John Riordan prize for the best solution to an unsolved problem in the OEIS
    via aperiodical

    As mentioned previously, the Encyclopedia of Integer Sequences is 50 this year. To celebrate that fact, and to encourage readers to concentrate on filling in the gaps in the missing entries instead of just adding new ones, there’s a \$1,000 prize for...

  • Graph makeover: Fractal scatterplot
    via blogs.sas

    One of the marvels of the Internet is the Online Encyclopedia of Integer Sequences (OEIS). Started 50 years ago by Neil J. A. Sloane (pic) as a graduate student, the repository now contains more than 256,000 integer sequences run by a non-profit OEIS...

  • Plots of 1000 sequences from the Online Encyclopedia of Integer...
    via reproduct1on.tumblr

    Plots of 1000 sequences from the Online Encyclopedia of Integer Sequences (OEIS) shown at the rate of 2 sequences per second. The audio was generated from Recaman’s sequence (A005132, the last sequence plotted). The plots become wilder as the movie...

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Oeis.org popular pages

  • The On-Line Encyclopedia of Integer Sequences (OEIS)

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

  • A274916 - OEIS

    A274916 Triangle T(n, k) read by rows: sum of residues p^(q-1) (mod q^2) and q^(p-1) (mod p^2), where p = prime(n) and q = prime(k) for ...

  • A036468 - OEIS

    A036468 Individual edits: COMMENTS Records in a(n) are for 2n+1 = 3, 5, 11, 15, 25, 35, 55, 65, 85, 125, 145, 185, 205, 215, 235, 265, 295, 325,...

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