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 | 22 |
| 2 | 484 |
| 3 | 4904 |
| 4 | 28450 |
| 5 | 120307 |
| 6 | 428187 |
| 7 | 1370104 |
| 8 | 4063584 |
| 9 | 11337648 |
| 10 | 29980136 |
| 11 | 75501066 |
| 12 | 181755554 |
| 13 | 419574383 |
| 14 | 931417149 |
| 15 | 1993443114 |
| 16 | 4122964868 |
| 17 | 8258744026 |
| 18 | 16054980456 |
| 19 | 30348305906 |
| 20 | 55882034882 |
| 21 | 100405014805 |
| 22 | 176305599685 |