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 | 3 |
| 2 | 4 |
| 3 | 9 |
| 4 | 19 |
| 5 | 24 |
| 6 | 131 |
| 7 | 139 |
| 8 | 339 |
| 9 | 5881 |
| 10 | 14849 |
| 11 | 29501 |
| 12 | 57169 |
| 13 | 63061 |
| 14 | 65789 |
| 15 | 542781 |
| 16 | 2439241 |
| 17 | 3197249 |
| 18 | 4111561 |
| 19 | 8614481 |
| 20 | 48657789 |
| 21 | 218234169 |
| 22 | 309296261 |
| 23 | 731499089 |
| 24 | 1191549689 |
| 25 | 1569571661 |
| 26 | 2471800109 |
| 27 | 5687426561 |
| 28 | 9505043161 |
| 29 | 67784277581 |
| 30 | 79468538969 |
| 31 | 257067141569 |
| 32 | 290324629889 |
| 33 | 397393221689 |
| 34 | 445568135041 |
| 35 | 2260763053809 |