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 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 44 |
| 6 | 149 |
| 7 | 543 |
| 8 | 2096 |
| 9 | 8539 |
| 10 | 36444 |
| 11 | 162380 |
| 12 | 752181 |
| 13 | 3612037 |
| 14 | 17933038 |
| 15 | 91843329 |
| 16 | 484280386 |
| 17 | 2624400428 |
| 18 | 14595111277 |
| 19 | 83178971707 |
| 20 | 485218783724 |
| 21 | 2893881790823 |
| 22 | 17628815344600 |
| 23 | 109585578277012 |
| 24 | 694575012732989 |
| 25 | 4485139961090153 |
| 26 | 29486515600393930 |