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 | 14 |
| 2 | 159 |
| 3 | 1676 |
| 4 | 17005 |
| 5 | 168570 |
| 6 | 1645035 |
| 7 | 15873240 |
| 8 | 151863705 |
| 9 | 1443272870 |
| 10 | 13643264503 |
| 11 | 128404376292 |
| 12 | 1204055841157 |
| 13 | 11255397745298 |
| 14 | 104933302809795 |
| 15 | 976016662472880 |
| 16 | 9059771065058865 |
| 17 | 83945271527170110 |
| 18 | 776569280469986895 |
| 19 | 7173673630527966780 |
| 20 | 66182347507155379101 |
| 21 | 609866573826736447914 |