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 | 6 |
| 3 | 7 |
| 4 | 9 |
| 5 | 14 |
| 6 | 21 |
| 7 | 37 |
| 8 | 69 |
| 9 | 670 |
| 10 | 3471 |
| 11 | 3477 |
| 12 | 5160 |
| 13 | 9500 |
| 14 | 15432 |
| 15 | 67054 |
| 16 | 302224 |
| 17 | 791733 |
| 18 | 861781 |
| 19 | 1425779 |
| 20 | 6242689 |
| 21 | 71511220 |
| 22 | 187308565 |
| 23 | 318733908 |
| 24 | 336841318 |
| 25 | 343858368 |
| 26 | 499742949 |
| 27 | 4088136488 |
| 28 | 4172097579 |
| 29 | 9981207398 |