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 | 2 |
| 3 | 5 |
| 4 | 6 |
| 5 | 10 |
| 6 | 18 |
| 7 | 30 |
| 8 | 82 |
| 9 | 4866 |
| 10 | 8784 |
| 11 | 10170 |
| 12 | 23364 |
| 13 | 76296 |
| 14 | 247166 |
| 15 | 585570 |
| 16 | 735480 |
| 17 | 848754 |
| 18 | 1559520 |
| 19 | 2884840 |
| 20 | 11272940 |
| 21 | 35642420 |
| 22 | 56652788 |
| 23 | 174935486 |
| 24 | 196398413 |
| 25 | 679063441 |
| 26 | 1398826844 |
| 27 | 1542228164 |
| 28 | 1665703953 |
| 29 | 2699813692 |
| 30 | 5734751503 |