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 | 0 |
| 1 | 7 |
| 2 | 196 |
| 3 | 3087 |
| 4 | 38416 |
| 5 | 420175 |
| 6 | 4235364 |
| 7 | 40353607 |
| 8 | 368947264 |
| 9 | 3268642167 |
| 10 | 28247524900 |
| 11 | 239256535903 |
| 12 | 1993145356944 |
| 13 | 16374242758783 |
| 14 | 132931722278404 |
| 15 | 1068201339737175 |
| 16 | 8507630225817856 |
| 17 | 67230218542302823 |
| 18 | 527606005722985476 |