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 | 44 |
| 2 | 989 |
| 3 | 15136 |
| 4 | 177374 |
| 5 | 1697080 |
| 6 | 13804461 |
| 7 | 98156916 |
| 8 | 622600869 |
| 9 | 3577478696 |
| 10 | 18848352755 |
| 11 | 91943892924 |
| 12 | 418593879770 |
| 13 | 1790510819500 |
| 14 | 7236416033496 |
| 15 | 27766992285908 |
| 16 | 101579448507141 |
| 17 | 355579239690840 |
| 18 | 1194844427708580 |