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 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 31 |
| 6 | 109 |
| 7 | 253 |
| 8 | 97 |
| 9 | 271 |
| 10 | 1621 |
| 11 | 199 |
| 12 | 3961 |
| 13 | 1769 |
| 14 | 12013 |
| 15 | 16381 |
| 16 | 3169 |
| 17 | 24991 |
| 18 | 15877 |
| 19 | 180881 |
| 20 | 265201 |
| 21 | 2620801 |
| 22 | 26753 |
| 23 | 781219 |
| 24 | 14473441 |
| 25 | 693551 |
| 26 | 55689349 |
| 27 | 18294823 |