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 | 7 |
| 2 | 17 |
| 3 | 71 |
| 4 | 449 |
| 5 | 881 |
| 6 | 2591 |
| 7 | 9521 |
| 8 | 39761 |
| 9 | 106721 |
| 10 | 179999 |
| 11 | 206081 |
| 12 | 342791 |
| 13 | 388961 |
| 14 | 596231 |
| 15 | 847601 |
| 16 | 1292831 |
| 17 | 2268449 |
| 18 | 2571911 |
| 19 | 2836961 |
| 20 | 3612671 |
| 21 | 6223391 |
| 22 | 6329681 |
| 23 | 6415361 |
| 24 | 8520191 |
| 25 | 8946449 |
| 26 | 9409121 |
| 27 | 10342151 |
| 28 | 12550049 |
| 29 | 16485281 |
| 30 | 18800711 |