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 | 10 |
| 2 | 21 |
| 3 | 55 |
| 4 | 253 |
| 5 | 1081 |
| 6 | 1711 |
| 7 | 3403 |
| 8 | 5671 |
| 9 | 13861 |
| 10 | 15931 |
| 11 | 25651 |
| 12 | 34453 |
| 13 | 60031 |
| 14 | 64261 |
| 15 | 73153 |
| 16 | 108811 |
| 17 | 114481 |
| 18 | 126253 |
| 19 | 158203 |
| 20 | 171991 |
| 21 | 258121 |
| 22 | 351541 |
| 23 | 371953 |
| 24 | 392941 |
| 25 | 482653 |
| 26 | 518671 |
| 27 | 703891 |
| 28 | 822403 |
| 29 | 853471 |
| 30 | 869221 |
| 31 | 933661 |
| 32 | 1034641 |
| 33 | 1104841 |