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 | 1 |
| 2 | 3 |
| 3 | 31 |
| 4 | 159 |
| 5 | 2347 |
| 6 | 6549 |
| 7 | 73111 |
| 8 | 107621 |
| 9 | 601279 |
| 10 | 631387 |
| 11 | 1003101 |
| 12 | 6976007 |
| 13 | 11110539 |
| 14 | 26126311 |
| 15 | 5421178993 |