have access to the computer where the database was maintained, If the database helped As a result of their work, the new OEIS was finally launched on November 11, 2010. I'm not great at speaking in math terms, but I'll give it a try: this sequence is created by: given a value, x. This is the place to find out! Starting in 2002, NJAS added a group of associate editors to help NJAS's colleague David Applegate has also been of enormous help in getting the new system working. {\displaystyle |z|<1} Again, once the book appeared, many further sequences and updates were and work was begun on moving the database from NJAS's home page at AT&T What is a Mathematical Sequence? H See also the hints file for further useful information. n The individual elements in a sequence are called terms. Find out about their fascinating properties and take your time to think these through. In the end, Russ Cox completely rewrote all the programs needed to maintain the database and answer queries - a huge task! Mathematical Journeys: Carl Gauss and the Sum of an Arithmetic Series There's a famous (and probably apocryphal) story about the mathematician Carl Friedrich Gauss that goes something like this: Gauss was 9 years old, and sitting in his math class. Click 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: . on the AT&T Labs website. NOTE: The Main Page on the OEIS Wiki has much more information (FAQ, Index, Style Sheet, Trouble Logging In, Citations, etc.). Mathematics as an expression of the human mind reflects the active will, the contemplative reason, and the desire for aesthetic perfection. | People are always asking about this, so there is a section about them in the, Recent additions to the OEIS can be seen by clicking the, You can also browse the recent additions using the, For contributing a new sequence, comment or more terms for an existing sequence, see, R. L. Graham, D. E. Knuth and O. Patashnik's, If you are writing a paper and wish to refer the Catalan numbers, say (sequence, In an HTML file one might say something like this: ... where the C(n) are the Catalan numbers (