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 | 5 |
| 3 | 6 |
| 4 | 20 |
| 5 | 27 |
| 6 | 77 |
| 7 | 112 |
| 8 | 294 |
| 9 | 450 |
| 10 | 1122 |
| 11 | 1782 |
| 12 | 4290 |
| 13 | 7007 |
| 14 | 16445 |
| 15 | 27456 |
| 16 | 63206 |
| 17 | 107406 |
| 18 | 243542 |
| 19 | 419900 |
| 20 | 940576 |
| 21 | 1641486 |
| 22 | 3640210 |
| 23 | 6418656 |
| 24 | 14115100 |
| 25 | 25110020 |
| 26 | 54826020 |
| 27 | 98285670 |
| 28 | 213286590 |
| 29 | 384942375 |