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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 17 |
| 4 | 71 |
| 5 | 121 |
| 6 | 731 |
| 7 | 1711 |
| 8 | 41099 |
| 9 | 370019 |
| 10 | 740101 |
| 11 | 2713789 |
| 12 | 1206137 |
| 13 | 423355111 |
| 14 | 846710651 |
| 15 | 1814380259 |
| 16 | 203210595443 |
| 17 | 12654139763 |
| 18 | 531473870981 |
| 19 | 43758015399281 |
| 20 | 525096184837561 |
| 21 | 441080795274037 |
| 22 | 22054039763790029 |