OEIS — The On-Line Encyclopedia of Integer Sequences
A public mathematical commons that turns a few integers into references, formulas, implementations, and context.
The Order of Mathematical Public Service
For making it possible to look at a strange sequence of integers and ask the internet what universe it belongs to.
Why It Belongs
OEIS is one of the best examples of what the internet is for: a public, searchable, cumulative reference maintained by people who care more about the knowledge than the packaging.
The magic of OEIS is that it turns a tiny scrap of mathematical evidence into a portal. You find a sequence, and suddenly you are in contact with formulas, names, literature, examples, implementations, cross-references, and adjacent structures. It functions both as a lookup table and as a machine for mathematical recognition.
It also belongs in the Hall because it has the right old-web virtues: density, seriousness, durability, and zero interest in pretending deep material should be flattened into content sludge. It is useful immediately, and then it keeps getting more useful the more mathematics you know.
What To Preserve
Preserve the public-searchable structure of the thing: sequence entries, references, comments, formulas, links, examples, and the connective tissue between them.
OEIS is not just a database. It is a map of mathematical culture built around sequences as handles. That combination of rigor, utility, and accumulated human annotation is extremely hard to replace once lost.
Related Inductees
Adjacent artifacts, tools, and internet relics
The Order of Severe Benchmarks
For funding one of the internet's purest examples of turning a philosophical argument into a file-size contest.
The Hutter Prize
An aggressively old-school prize site that treats better compression of Wikipedia as a measurable path toward machine intelligence.
The Grand Permanence Medal
For doing more than almost anyone else to ensure the web does not dissolve into rumor.
Internet Archive / Wayback Machine
The single most important institutional memory system on the public web: a vast archive of pages, media, software, and vanished internet history.
The Grand Archive Laurels
For lifetime achievement in public weirdness, mathematical density, and internet maximalism.
mrob.com — Robert Munafo's Website
A sprawling personal site covering mathematics, large numbers, fractals, cellular automata, and more. The kind of website that used to be common and should still be.