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 | 21 |
| 3 | 261 |
| 4 | 273 |
| 5 | 17748 |
| 6 | 17749 |
| 7 | 20820 |
| 8 | 20821 |
| 9 | 65620 |
| 10 | 65621 |
| 11 | 70740 |
| 12 | 70741 |
| 13 | 83268 |
| 14 | 83269 |
| 15 | 86292 |
| 16 | 86293 |
| 17 | 1066068 |
| 18 | 1066069 |
| 19 | 1070420 |
| 20 | 1135701 |
| 21 | 1135893 |
| 22 | 1135953 |
| 23 | 5326161 |
| 24 | 5330001 |
| 25 | 5330241 |
| 26 | 5330260 |
| 27 | 5330261 |
| 28 | 5506389 |
| 29 | 5525829 |
| 30 | 5526801 |
| 31 | 5571909 |
| 32 | 5574933 |
| 33 | 5592321 |