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OEIS Reader's Guide The main OEIS page is http://oeis.org. Use that page for looking up a sequence, searching the database, contributing new sequences, editing sequences, etc. Welcome to OEIS Index to OEIS. Index to fractions in OEIS. Questions and Answers Page For New OEIS Questions and Answers Page for OEIS License Agreements Instructions For General Users Works Citing OEIS Suggested Projects Editorial Board More Pages OEIS: The MOVIE The Multi-faceted Reach of the OEIS The OEIS is owned, maintained and supported by The OEIS Foundation Inc. - please give generously! Contributor's Guide Register (so that you can submit sequences or suggest changes). Trouble registering, logging in, changing password Style Sheet for OEIS (under construction) Things to do on the OEIS Editor's Guide Registered Users Instructions For Associate Editors Instructions For Editors-in-Chief Recent additions to OEIS Deleted Sequences Complaints About Editing Selected Recent Additions A239797 Decimal expansion of ${\frac {\sqrt {3}}{\sqrt[{3}]{4}}}$. A238271 Decimal expansion of $\sum _{n=1}^{\infty }{\frac {\mu (n)}{3^{n}}}$. A237042 UPC check digits. A236603 Lowest canonical Gray cycles of length $2n$. A235365 Smallest odd prime factor of $3^{n}+1$. A234522 Decimal expansion of ${\sqrt[{4}]{7}}-{\sqrt[{4}]{5}}$. A233748 Number of graphs on n vertices with edges colored with at most four interchangeable colors under the symmetries of the full edge permutation group. A232499 Number of unit squares, aligned with a Cartesian grid, completely within the first quadrant of a circle centered at the origin ordered by increasing radius. A231963 Concatenate $n$ with its UPC check digit. A230624 Numbers $n$ with property that for every base $b\geq 2$, there is a number $m$ such that $m+s(m)=n$, where $s(m)$ is the sum of digits in the base $b$ expansion of $m$.

Sequence of the Day [talk] Sequence of the Day for December 5 A197723: Decimal expansion of 3 π 2 . 4.71238898038... Multiplying a number by  − i (with i being the imaginary unit 2√   − 1 ) is equivalent to rotating it by this amount on the complex plane, which as radians, works out to 270 ° or 300 gradians. Featured article (Check back later for today's.) OEIS lookup <form action="http://oeis.org/search" method="get"><input type="submit" value="Search" name="go"><input maxLength="1024" size="55" dir="LTR" name="q" value="" title="Search Query"> <a href="http://oeis.org/hints.html">(hints)</a></form> (This is a trial template:OEIS lookup -- as you can see, it does not work. Request for a convenient wiki extension (such as http://www.mediawiki.org/wiki/Extension:InputBox) is under way... Did you know... Template:Did you know On this day... December 5, 1770 James Stirling dies in Edinburgh. December 5, 1859 Louis Poinsot dies in Paris. December 5, 1863 Paul Painlevé is born in Paris. December 5, 1901 Werner Heisenberg is born in Würzburg. December 5, 2005 Claude Ambrose Rogers dies. Sequences in the News Aug 17 2021 Swiss scientists announce they have calculated π (A000796) to 62.8 trillion digits in only 108 days. Dec 25 2018 German Heise-News "integers, please" column explains A003173 and OEIS. Feb 01 2018 Alphabet announced a $8,589,869,056 = $A000396(6) stock buyback. Jan 03 2018 Largest known term of A000043 announced: 77232917. Nov 18 2016 PrimeGrid proves that 10223 is not a Sierpinski number, since 10223 × 2 31172165 + 1 is prime. So no changes to A076336 for now. Sep 14 2016 Tom Greer discovers the twin primes 2996863034895 × 2 1290000 ± 1 using PrimeGrid, TwinGen and LLR. Jan 19 2016 Largest known term of A000043 announced: 74207281, also discovered by Curtis Cooper.

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OEIS: The MOVIE

The On-Line Encyclopedia of Integer Sequences™ (OEIS™) Wiki

These are links to the OEIS Wiki Welcome to OEIS (needs to be reformatted for wiki) Accounts Register (so that you can submit sequences or suggest changes) Trouble registering, logging in, changing password Editorial Board Registered Users Q and A Questions and Answers Page For New OEIS Questions and Answers Page for OEIS License Agreements Instructions Style Sheet for OEIS (under construction) Instructions For General Users Instructions For Associate Editors Instructions For Editors-in-Chief Indexes Index to OEIS Index to fractions in OEIS Other links Deleted Sequences Complaints About Editing More Pages Works Citing OEIS The Multi-faceted Reach of the OEIS The On-Line Encyclopedia of Integer Sequences™ (OEIS™) These are links to the main OEIS Recent additions to OEIS Sequences awaiting review (drafts proposed for review) Sequences being edited (drafts not proposed for review)