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 | 2 |
| 2 | 7 |
| 3 | 65 |
| 4 | 137 |
| 5 | 339 |
| 6 | 1493 |
| 7 | 9297 |
| 8 | 20087 |
| 9 | 29384 |
| 10 | 49471 |
| 11 | 177797 |
| 12 | 227268 |
| 13 | 4268621 |
| 14 | 4495889 |
| 15 | 31243955 |
| 16 | 35739844 |
| 17 | 102723643 |
| 18 | 138463487 |
| 19 | 241187130 |
| 20 | 1103212007 |
| 21 | 1344399137 |
| 22 | 57567975761 |
| 23 | 346752253703 |
| 24 | 404320229464 |
| 25 | 1964033171559 |