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 | 4 |
| 3 | 18 |
| 4 | 30 |
| 5 | 428 |
| 6 | 458 |
| 7 | 527 |
| 8 | 542 |
| 9 | 659 |
| 10 | 922 |
| 11 | 1355 |
| 12 | 1817 |
| 13 | 3292 |
| 14 | 4635 |
| 15 | 6841 |
| 16 | 162050 |
| 17 | 197106 |
| 18 | 270086 |
| 19 | 270919 |
| 20 | 344064 |
| 21 | 2079442 |
| 22 | 5492021 |
| 23 | 196362299 |
| 24 | 220581908 |
| 25 | 1292221854 |
| 26 | 5841289122 |
| 27 | 11886461834 |