This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 53 |
| 2 | 139 |
| 3 | 953 |
| 4 | 44771 |
| 5 | 189653 |
| 6 | 1494692464747 |
| 7 | 26821168009247 |
| 8 | 49900729438853608883 |
| 9 | 5173807429197933544505507 |
| 10 | 235602509965217050702320581591948981 |