The On-Line Encyclopedia of Integer Sequences catalogues hundreds of thousands of integer sequences, and has been cited in thousands of research papers. The goal of this project is to discover new ...

Number enthusiasts may be looking to the new year with a touch of melancholy. Another perfect square like 2025 (45 2 = 2,025) ...

For anyone who deals with number sequences, the Online Encyclopedia of Integer Sequences is the most important search engine in the world. It is the work of the British-Australian mathematician Neil ...

One of the curious properties of mathematics is its beauty. But exactly what mathematicians mean by beauty is hard to capture. Perhaps the most famous example is Euler’s relation, e iπ + 1 = 0, which ...

When Neil Sloane was a young man, he started collecting objects he found beautiful. A common enough preoccupation perhaps, except for the particular objects Sloane chose: number sequences. CURIOUS ...