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 | 546 |
| 3 | 2 |
| 4 | 46 |
| 5 | 6630 |
| 6 | 76670 |
| 7 | 211659630 |
| 8 | 6 |
| 9 | 261870 |
| 10 | 111418 |
| 11 | 46 |
| 12 | 13589784390 |
| 13 | 524588442 |
| 14 | 114 |
| 15 | 1138240087314330 |
| 16 | 2 |
| 17 | 276742830 |
| 18 | 26805565070 |
| 19 | 1909802752494 |
| 20 | 3210 |
| 21 | 15370 |
| 22 | 177430547680928732190 |
| 23 | 358 |
| 24 | 5760551069383110 |
| 25 | 76004922 |
| 26 | 1126 |
| 27 | 4347631610092420338 |
| 28 | 81366 |