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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 8 |
| 6 | 23 |
| 7 | 59 |
| 8 | 109 |
| 9 | 133 |
| 10 | 221 |
| 11 | 411 |
| 12 | 699 |
| 13 | 998 |
| 14 | 1382 |
| 15 | 5075 |
| 16 | 5542 |
| 17 | 6343 |
| 18 | 14599 |
| 19 | 15092 |
| 20 | 21716 |
| 21 | 23635 |
| 22 | 30220 |
| 23 | 50710 |
| 24 | 221627 |
| 25 | 350070 |
| 26 | 371695 |
| 27 | 487290 |
| 28 | 995255 |