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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 7 |
| 9 | 8 |
| 10 | 9 |
| 11 | 10 |
| 12 | 109 |
| 13 | 768 |
| 14 | 3627 |
| 15 | 13636 |
| 16 | 43665 |
| 17 | 123744 |
| 18 | 318223 |
| 19 | 755802 |
| 20 | 1679581 |
| 21 | 3527140 |
| 22 | 70542781 |
| 23 | 878845662 |
| 24 | 7113969943 |
| 25 | 44573747024 |
| 26 | 231938007625 |
| 27 | 1043938332476 |
| 28 | 4176060103827 |
| 29 | 15138650342428 |
| 30 | 50462774778029 |
| 31 | 156435448534980 |