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 | 4 |
| 3 | 53 |
| 4 | 57 |
| 5 | 110 |
| 6 | 167 |
| 7 | 277 |
| 8 | 444 |
| 9 | 721 |
| 10 | 119409 |
| 11 | 120130 |
| 12 | 239539 |
| 13 | 1557364 |
| 14 | 1796903 |
| 15 | 3354267 |
| 16 | 15213971 |
| 17 | 109852064 |
| 18 | 2871367635 |
| 19 | 2981219699 |
| 20 | 14796246431 |
| 21 | 17777466130 |
| 22 | 50351178691 |
| 23 | 68128644821 |
| 24 | 186608468333 |
| 25 | 254737113154 |
| 26 | 696082694641 |
| 27 | 950819807795 |
| 28 | 2597722310231 |
| 29 | 13939431358950 |