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) |
|---|---|
| 0 | 1 |
| 1 | 43 |
| 2 | 945 |
| 3 | 14147 |
| 4 | 162238 |
| 5 | 1519706 |
| 6 | 12107381 |
| 7 | 84352455 |
| 8 | 524443953 |
| 9 | 2954877827 |
| 10 | 15270874059 |
| 11 | 73095540169 |
| 12 | 326649986846 |
| 13 | 1371916939730 |
| 14 | 5445905213996 |
| 15 | 20530576252412 |
| 16 | 73812456221233 |
| 17 | 253999791183699 |
| 18 | 839265188017740 |