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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 11 |
| 7 | 41 |
| 8 | 77 |
| 9 | 365 |
| 10 | 694 |
| 11 | 3984 |
| 12 | 7639 |
| 13 | 51499 |
| 14 | 99343 |
| 15 | 769159 |
| 16 | 1490474 |
| 17 | 13031514 |
| 18 | 25341713 |
| 19 | 246925295 |
| 20 | 481540391 |
| 21 | 5173842311 |
| 22 | 10113069526 |
| 23 | 118776068256 |
| 24 | 232612909297 |
| 25 | 2964697094281 |
| 26 | 5815557347521 |
| 27 | 79937923931761 |
| 28 | 157024987610282 |
| 29 | 2315462770608870 |
| 30 | 4553838477539219 |